Complaint vs complain becomes easy to understand when you identify the job each word performs. Complaint is a noun. It names a statement of dissatisfaction, a problem someone reports, or sometimes a physical symptom. Complain is a verb. It describes the action of expressing dissatisfaction, reporting a problem, or mentioning pain.
A customer can make a complaint about poor service. That customer may complain to the manager. The two words share a meaning, but you cannot exchange them because one names something and the other expresses an action.
Use complaint after words such as a, the, my, or your. Choose complain after a subject such as I, we, customers, or employees. This guide explains the difference, correct sentence patterns, prepositions, verb forms, and common mistakes.
Quick Answer
Complaint is a noun that names an expression of dissatisfaction:
- We submitted a complaint about the service.
Complain is a verb that means to express dissatisfaction:
- We plan to complain about the service.
Remember this simple distinction: You complain when you make a complaint.
How Do You Use Complaint in a Sentence?
Complaint is a noun that refers to an expression of dissatisfaction, a problem reported, or an official statement about something wrong.
Examples:
- The customer filed a complaint about the service.
- The manager listened to her complaint carefully.
When to Use the Word “Complaint”?
Use complaint when you are talking about a problem, criticism, or statement of dissatisfaction. Since complaint is a noun, it often comes after words like make, file, receive, or handle.
Examples:
- The company received a complaint from a customer.
- He made a complaint about the noise.
How Can I Use Complain?
Use complain as a verb when someone expresses dissatisfaction or says that something is wrong.
Examples:
- She complained about the long wait.
- Many customers complain when prices increase.
What Is the Difference Between Complain and Complaint?
Complain and complaint have the same basic meaning but different uses. Complain is a verb that describes the action of expressing dissatisfaction, while complaint is a noun that refers to the problem or statement itself.
Examples:
- I want to complain about the service.
- I want to make a complaint about the service.
Complaint vs Complain: What’s the Difference?
The difference is simple: complain is an action word (verb), while complaint is a thing or issue (noun).
Examples:
- Customers often complain about slow service.
- The company received several complaints about slow service.
Why People Confuse Them
These words look and sound similar because they belong to the same word family. Their meanings also overlap. Both relate to dissatisfaction, criticism, discomfort, or the report of a problem.
Grammar creates the real difference:
- Complaint names the report, concern, or expression.
- Complain describes the act of expressing it.
Writers sometimes use complaint as a verb because phrases such as “I want to complaint” may seem logical. However, English requires the verb complain after to:
- Incorrect: I want to complaint.
- Correct: I want to complain.
Another common mix-up involves complains and complaints. Complains is a verb, while complaints is the plural form of the noun complaint.
Key Differences At A Glance
| Feature | Complaint | Complain |
|---|---|---|
| Part of speech | Noun | Verb |
| Main meaning | A statement or report of dissatisfaction | To express dissatisfaction |
| Pronunciation | kuhm-PLAYNT | kuhm-PLAYN |
| Singular example | A complaint | I complain |
| Common pattern | Make or file a complaint | Complain about something |
| Example | She submitted a complaint. | She complained about the delay. |
The final t offers a useful clue. Complaint names a thing, concern, or report. Complain, without the final t, expresses an action.
Meaning And Usage Difference
What Does Complaint Mean?
A complaint is a statement that something feels wrong, unfair, painful, or unsatisfactory. It can describe an informal expression of unhappiness or an official report.
Examples include:
- My main complaint concerns the slow internet connection.
- The hotel received a complaint about the noise.
- She filed a formal complaint with the company.
- His only complaint was the long wait.
The noun can refer to the problem itself:
- Lack of parking remains a common complaint among residents.
It can also describe a medical symptom or health concern:
- The patient’s chief complaint was persistent shoulder pain.
In legal contexts, a complaint can name a formal document that begins a civil case or states allegations. This specialized meaning does not change the word’s grammatical role: it remains a noun.
What Does Complain Mean?
Complain means to express dissatisfaction, unhappiness, pain, or concern. It tells readers what someone does.
- Customers often complain about unexpected fees.
- I need to complain to the landlord.
- She complained that the room felt cold.
- Several residents complained about the construction noise.
The verb changes form according to tense and subject:
- Base form: complain
- Third-person singular: complains
- Past tense: complained
- Present participle: complaining
Examples:
- I rarely complain.
- Marcus complains about the traffic.
- We complained to customer service yesterday.
- Several passengers are complaining about the delay.
Complaint And Complain In The Same Sentence
Both words can appear naturally in one sentence:
- I called to complain, and the manager recorded my complaint.
- Customers who complain should receive a response to their complaint.
- Elena made a complaint because she wanted to complain about the damaged product.
- Before you complain, decide whether you need to make a formal complaint.
In each example, complain expresses an action and complaint names the concern or report.
How To Use Complain With Prepositions
The verb complain often appears with about, to, or of. Each pattern communicates something different.
Complain About Something
Use complain about to identify the problem or subject causing dissatisfaction.
- Guests complained about the noise.
- He complains about his schedule every week.
- We called to complain about the extra charge.
- Several students complained about the assignment deadline.
The words after about answer the question, “What is the complaint about?”
Complain To Someone
Use complain to to identify the person, company, department, or authority that receives the complaint.
- She complained to the manager.
- We complained to the airline.
- Residents complained to city officials.
- I plan to complain to customer support.
The words after to answer the question, “Who received the complaint?”
Complain To Someone About Something
You can combine both patterns:
- I complained to the manager about the service.
- Parents complained to the principal about the new policy.
- Several tenants complained to the landlord about the broken heater.
This structure clearly identifies both the recipient and the problem.
Complain Of Something
Complain of often appears when someone reports pain, illness, or a physical symptom.
- The patient complained of chest pain.
- He complained of dizziness after the trip.
- Several runners complained of sore muscles.
In everyday American conversation, people may also use complain about for physical discomfort. Medical writing often favors complain of.
Complain That Something Happened
Use a that clause when you want to state a complete concern.
- Customers complained that the website kept crashing.
- She complained that no one had answered her email.
- Employees complained that the office was too cold.
Writers sometimes omit that in informal sentences:
- He complained the order had arrived late.
Including that usually makes the structure clearer.
Pronunciation Difference
The words share the same stressed syllable, but complaint ends with a clear t sound.
- Complaint: kuhm-PLAYNT
- Complain: kuhm-PLAYN
Say complain without adding a t sound. Add the final t only when saying complaint.
This pronunciation difference matches the spelling:
- complain → no final t
- complaint → final t
Tone, Context, And Formality
Both words work in casual, professional, academic, medical, and legal English. The surrounding phrase usually determines the tone.
Complain may sound informal when it describes repeated criticism:
- Ryan always complains about the weather.
In customer service, the same verb can express a reasonable attempt to solve a problem:
- I am writing to complain about an incorrect charge.
Complaint often sounds more official in phrases such as:
- File a complaint
- Submit a complaint
- Formal complaint
- Written complaint
- Customer complaint
A complaint does not always involve anger. Someone may calmly report a billing mistake, safety concern, medical symptom, or service problem.
Words such as whine and moan often carry a more negative tone. They may suggest that a person complains too much. Use them carefully when you want to remain neutral or professional.
Which One Should You Use?
| Context | Best Choice | Why |
|---|---|---|
| Naming a customer’s concern | Complaint | It functions as a noun |
| Expressing dissatisfaction | Complain | It describes an action |
| Reporting a problem formally | Complaint | You file or submit a report |
| Speaking to a manager about poor service | Complain | It describes what you do |
| Referring to several reported problems | Complaints | It is the plural noun |
| Describing what one person regularly does | Complains | It is the singular present-tense verb |
| Mentioning a medical symptom | Complaint | It names the symptom or concern |
| Reporting that you feel pain | Complain | It describes the act of reporting pain |
Try this replacement test:
- If concern, report, or grievance fits, choose complaint.
- If protest, object, or express dissatisfaction fits, choose complain.
For example:
- We received a formal report. → We received a formal complaint.
- Customers may express dissatisfaction. → Customers may complain.
When One Choice Sounds Wrong
After A, An, Or The
Articles normally introduce nouns, so use complaint:
- Incorrect: She made a complain.
- Correct: She made a complaint.
- Incorrect: The complain reached the manager.
- Correct: The complaint reached the manager.
After To In An Infinitive
The infinitive marker to requires a base verb, so choose complain:
- Incorrect: I need to complaint.
- Correct: I need to complain.
- Incorrect: They plan to complaint about the bill.
- Correct: They plan to complain about the bill.
After Make, File, Submit, Or Receive
These verbs usually take the noun complaint:
- Make a complaint
- File a complaint
- Submit a complaint
- Receive a complaint
- Investigate a complaint
Do not write “make a complain” or “file a complain.”
After A Person Or Pronoun
When the word directly tells what someone does, use the correct form of complain:
- I complain.
- She complains.
- They complained.
- Customers are complaining.
The subject and tense determine the verb form.
Complains vs Complaints
Writers commonly confuse these forms because they sound similar.
Complains is a verb. Use it with a singular third-person subject such as he, she, it, the customer, or my neighbor.
- She complains about the noise.
- My neighbor complains whenever we park outside.
- The customer complains about every small delay.
Complaints is the plural of the noun complaint.
- The company received five complaints.
- We reviewed all customer complaints.
- Noise complaints increased during the event.
A quick check can prevent errors:
- Someone complains.
- Someone makes complaints.
Common Mistakes And Quick Fixes
Using Complaint As A Verb
Incorrect:
- I want to complaint about my order.
Correct:
- I want to complain about my order.
Using Complain As A Noun
Incorrect:
- We submitted a complain yesterday.
Correct:
- We submitted a complaint yesterday.
Using The Wrong Preposition
Unclear:
- She complained the manager about the service.
Correct:
- She complained to the manager about the service.
Use to for the recipient and about for the problem.
Confusing Complains And Complaints
Incorrect:
- The hotel received several complains.
Correct:
- The hotel received several complaints.
The hotel received things, so the sentence needs a plural noun.
Forgetting The S With He, She, Or It
Incorrect:
- He complain about his workload every day.
Correct:
- He complains about his workload every day.
Use complains with a singular third-person subject in the simple present tense.
Adding A Double N
Incorrect:
- She is complainning about the delay.
Correct:
- She is complaining about the delay.
The correct form has one n: complaining.
Everyday Examples
Examples With Complaint
The restaurant manager listened to our complaint.
Her only complaint concerned the room temperature.
I submitted a written complaint through the company’s website.
The store resolved my complaint within two days.
Noise remains the most common complaint in the building.
He made a formal complaint about the damaged equipment.
Customer service recorded every complaint.
The patient described her main complaint to the doctor.
We received no complaints about the updated schedule.
The supervisor investigated the employee’s complaint.
Examples With Complain
I rarely complain about minor delays.
Customers can complain directly to the support team.
Please do not complain until you understand the full situation.
Several passengers complained about the canceled flight.
Theo always complains when the internet slows down.
Residents are complaining about late-night noise.
She called the company to complain about the bill.
We complained to the landlord about the leaking pipe.
The patient complained of severe back pain.
Employees may complain without acting disrespectfully.
Examples With Both Words
- Mia called to complain, and the representative documented her complaint.
- The manager addressed every complaint before customers could complain again.
- If you want to complain formally, submit a written complaint.
- His complaint seemed reasonable, so no one criticized him for choosing to complain.
- Customers who complain should explain their complaint clearly.
Dictionary-Style Word Details
Verb
- Complaint: Not commonly used as a verb in standard American English.
- Complain: To express dissatisfaction, pain, concern, or disapproval.
Examples:
- Residents complain about heavy traffic.
- She complained to the manager.
- He complains whenever the schedule changes.
Noun
- Complaint: A statement of dissatisfaction, a reported problem, a physical symptom, or a formal allegation.
- Complain: Not commonly used as a noun in standard American English.
Examples:
- We received one complaint.
- The customer filed a formal complaint.
- Headaches were the patient’s main complaint.
Synonyms
Closest plain alternatives for complaint include:
- Grievance
- Objection
- Concern
- Protest
- Criticism
- Report
- Claim
These words do not match every meaning. For example, a grievance often sounds more formal, while a concern may sound milder.
Closest plain alternatives for complain include:
- Protest
- Object
- Grumble
- Gripe
- Criticize
- Express dissatisfaction
- Report a problem
Grumble, gripe, and whine can suggest repeated or unreasonable criticism. They do not always provide neutral replacements.
No single antonym fits every use. Depending on context, possible contrasts include praise, approve, accept, or express satisfaction.
Example Sentences
Complaint:
- The airline responded to my complaint.
- Parking has become a frequent complaint among residents.
- The patient’s primary complaint involved knee pain.
Complain:
- Travelers often complain about hidden fees.
- I complained to the company about the damaged item.
- She complained that the instructions were unclear.
Word History
Complaint and complain come from related French and Latin forms associated with lamenting or expressing distress. English developed complain as the verb and complaint as the related noun.
Their shared history explains their similar appearance and meaning. Modern grammar still assigns them different roles: complain expresses the action, while complaint names the expression or reported problem.
Phrases Containing
Common phrases with complaint include:
- Make a complaint
- File a complaint
- Submit a complaint
- Formal complaint
- Written complaint
- Customer complaint
- Consumer complaint
- Noise complaint
- Criminal complaint
- Chief complaint
- Letter of complaint
- Without complaint
Common phrases with complain include:
- Complain about something
- Complain to someone
- Complain of pain
- Complain that something happened
- Never complain
- Constantly complain
- Complain bitterly
- Complain formally
How To Remember Complaint vs Complain
Remember this short sentence:
You complain when you make a complaint.
The final t can also remind you that a complaint is a thing. Both complaint and thing contain the letter t.
Sentence structure offers another clue:
- A complaint sounds correct because a introduces a noun.
- To complain sounds correct because to introduces the base verb.
When uncertain, ask whether the sentence needs a thing or an action:
- Thing, concern, or report → complaint
- Action of expressing concern → complain
Frequently Asked Questions
What is the difference between complaint and complain?
Complaint is a noun, while complain is a verb. A complaint names an expression of dissatisfaction. Complain describes the action of expressing it.
Is it correct to say “I have a complain”?
No. Write “I have a complaint.” The word after a must function as a noun. You could also say, “I want to complain.”
Should I say “make a complaint” or “do a complaint”?
Use make a complaint. You can also file, submit, raise, or report a complaint, depending on the situation.
Do I complain to someone or about someone?
Use complain to for the recipient and complain about for the subject:
- I complained to the manager about the employee’s behavior.
What is the plural of complaint?
The plural is complaints:
- The company received several complaints.
Do not confuse it with complains, the verb used in “She complains.”
What are the verb forms of complain?
The main forms are complain, complains, complained, and complaining.
Can complaint refer to a medical problem?
Yes. Medical professionals may use complaint to name the symptom or concern that brings a patient to an appointment. For example, “The patient’s chief complaint was abdominal pain.”
Is complaining always negative or rude?
No. Complaining can mean reporting a valid concern. Tone, wording, and frequency determine whether it sounds reasonable, professional, rude, or excessive.
Conclusion
Complaint and complain express related ideas, but they serve different grammatical purposes.
Use complaint as a noun that names a concern, report, expression of dissatisfaction, or physical symptom:
- The customer submitted a complaint.
Choose complain as a verb for the action of expressing dissatisfaction or reporting a problem:
- The customer called to complain.
Remember the simplest rule: You complain when you make a complaint.
