Complement and compliment are both correct English words, but they express different ideas.
Use complement when one person or thing completes, enhances, balances, or works well with another. Use compliment when someone expresses praise, admiration, approval, or courtesy.
The words can function as nouns and verbs. They also sound alike in standard American English, so their pronunciation will not help you choose the correct spelling. You must look at the intended meaning.
Quick Answer
Use complement when you mean that something completes or improves another thing.
The bright pillows complement the gray sofa.
Use compliment when you mean praise or a positive remark.
Elena complimented Marcus on his presentation.
A simple memory tip is to connect the e in complement with the e in complete. A complement helps complete something. A compliment with an i is something kind or approving that you say.
Why People Confuse Them
The words are easy to confuse because they differ by only one vowel. They are also pronounced alike in standard US English: KAHM-pluh-ment.
Both can be nouns:
The salad was a perfect complement to the meal.
Her manager gave her a sincere compliment.
Both can also be verbs:
The new lighting complements the room.
Her manager complimented her work.
Their similar spelling, identical pronunciation, and shared grammatical roles make context especially important.
Key Differences At A Glance
| Context | Best Choice | Why |
| Giving praise | compliment | It expresses admiration or approval. |
| Improving an outfit | complement | One item makes another look more complete. |
| Foods that work well together | complement | Their qualities create a pleasing combination. |
| Praising someone’s cooking | compliment | You are saying something positive. |
| People with balancing abilities | complement | Their different strengths work well together. |
| A positive comment | compliment | It is an expression of praise. |
| The required number of people | complement | It refers to the complete quantity needed. |
| A word that completes a sentence structure | complement | It has a specific grammatical meaning. |
| Formal good wishes or regards | compliment | The plural form can express courtesy or respect. |
Meaning and Usage Difference
The central difference is the purpose of the word.
- Complement: completion, enhancement, balance, compatibility, or a full quantity.
- Compliment: praise, admiration, approval, courtesy, or a positive remark.
When something complements another thing, the two work well together.
The roasted vegetables complement the grilled chicken.
The vegetables are not praising the chicken. They improve the meal by adding suitable flavors and textures.
When someone compliments another person, the speaker expresses approval or admiration.
The customer complimented the chef on the meal.
Here, the customer says something positive about the chef’s work.
The difference also applies to people. Two coworkers can complement each other when their abilities form a strong combination.
Priya’s creativity complements Ben’s attention to detail.
The same coworkers can compliment each other when they exchange praise.
Priya and Ben complimented each other on a successful launch.
The first sentence describes compatible abilities. The second describes positive remarks.
For a clear dictionary-based explanation, see Merriam-Webster’s guide to complement and compliment, which explains how complement means to complete or enhance, while compliment refers to praise or admiration.
Tone, Context, and Formality
Neither word is automatically more formal than the other. Their tone depends on the situation.
Complement usually has a neutral or descriptive tone. It commonly appears in discussions of clothing, design, food, teamwork, grammar, mathematics, music, and science.
The natural wood complements the white walls.
Compliment often has a positive social tone because it involves praise or courtesy.
Your explanation was clear and helpful.
That statement is a compliment.
The plural compliments can also appear in polite or formal expressions:
Please give your parents my compliments.
My compliments to the chef.
In these phrases, compliments means respectful wishes, approval, or courteous praise.
Which One Should You Use?
Choose the word by asking what the sentence communicates.
When the meaning is praise, admiration, approval, or a kind remark, use compliment.
I complimented Ava on her excellent customer service.
When the meaning is completion, enhancement, compatibility, or balance, use complement.
Ava’s calm manner complements her strong problem-solving skills.
Use complement for a complete quantity or required number.
The clinic now has a full complement of nurses.
Use complement for the grammatical term describing a word or phrase that completes the meaning of part of a sentence.
In “The soup tastes delicious,” “delicious” functions as a complement.
The easiest test is to replace the word mentally. If praise fits, choose compliment. If complete, enhance, or work well with fits, choose complement.
When One Choice Sounds Wrong
Using the wrong word can create an unintended or illogical meaning.
Consider this sentence:
The blue tie compliments his suit.
The sentence literally suggests that the tie praises the suit. Unless the tie can speak, the intended word is probably complements.
The blue tie complements his suit.
Now the sentence means that the tie works well with the suit.
The opposite mistake can also cause confusion:
The supervisor complemented me on my report.
This wording suggests that the supervisor completed or enhanced the speaker in some way. When the supervisor gave praise, the correct sentence is:
The supervisor complimented me on my report.
However, complement a person can be correct when the meaning is completion or balance.
Her planning skills complement the director’s creative vision.
The sentence does not describe praise. It explains how two people’s strengths work together.
Common Mistakes (and Quick Fixes)
Mistake: Using compliment for things that match
Incorrect:
The curtains compliment the furniture.
Correct:
The curtains complement the furniture.
The curtains enhance the room’s overall appearance.
Mistake: Using complement for spoken praise
Incorrect:
He complemented me on my new haircut.
Correct:
He complimented me on my new haircut.
The speaker gave an approving remark.
Mistake: Misreading “each other”
Both words can appear before each other, but the meanings differ.
Their skills complement each other.
Their skills form an effective combination.
They compliment each other often.
They regularly praise one another.
Mistake: Confusing the related adjectives
Complementary means completing, balancing, or working well together.
The two departments have complementary responsibilities.
Complimentary can mean praising.
The newspaper published a complimentary review.
It can also mean provided without charge.
The hotel offers a complimentary breakfast.
A complimentary breakfast is free. It is not a breakfast that completes another meal.
Mistake: Writing “complimentary colors” for matching colors
In discussions of color relationships, the standard term is complementary colors.
The designer used complementary shades to create contrast.
Use complimentary only when the meaning involves praise or something provided free as a courtesy.
Everyday Examples
Clothing:
The silver necklace complements the dark green dress.
Praise:
Several guests complimented her on the dress.
Food:
The spicy sauce complements the mild rice.
Restaurant courtesy:
The diner asked the server to send his compliments to the chef.
Workplace abilities:
Jordan’s writing experience complements Taylor’s design experience.
Workplace praise:
The department head complimented the team on finishing early.
Home design:
The warm lighting is a good complement to the wooden furniture.
Positive comment:
Calling the presentation memorable was a meaningful compliment.
Relationships:
Their personalities complement each other because one is patient and the other is energetic.
Friendly conversation:
They compliment each other without sounding insincere.
Staffing:
The company hired three people to restore its full complement of customer service representatives.
Grammar:
Some verbs require a complement to complete their meaning.
Dictionary-Style Word Details
Verb
Complement: To complete, enhance, balance, or work well with another person or thing.
The fresh herbs complement the tomato sauce.
Her research experience complements his practical knowledge.
The verb usually takes a direct object. You say that one thing complements another thing.
Compliment: To express praise, admiration, approval, or respect.
The coach complimented the players on their discipline.
A common structure is compliment someone on something.
She complimented him on his thoughtful response.
Noun
Complement: Something that completes, enhances, balances, or forms a fitting combination with something else.
The side table is a useful complement to the reading chair.
The noun commonly appears in the structure a complement to.
It can also mean the full quantity or number required:
The flight departed with a full complement of passengers.
In grammar, a complement is a word or group of words that completes the meaning of a predicate or another expression.
Compliment: An expression or act of praise, admiration, approval, courtesy, or respect.
Her comment about my writing was a genuine compliment.
Common noun structures include give a compliment, pay a compliment, receive a compliment, and take something as a compliment.
The plural form can mean good wishes or respectful regards:
Please send your family my compliments.
Synonyms
Complement — closest plain alternatives
As a noun:
- counterpart
- match
- accompaniment
- completing addition
- fitting addition
As a verb:
- complete
- enhance
- balance
- improve
- go well with
No single opposite fits every meaning. In descriptions of style or appearance, clash with may serve as a useful opposite of the verb.
Compliment — closest plain alternatives
As a noun:
- praise
- commendation
- flattering remark
- approving comment
- tribute
As a verb:
- praise
- commend
- applaud
- express admiration for
Depending on the context, useful opposites include criticize, insult, or disparage.
Example Sentences
Complement:
The citrus dressing complements the sweetness of the fruit.
These two classes complement each other because one covers theory and the other covers practice.
The agency finally has a full complement of trained employees.
The lamp is an attractive complement to the desk.
Compliment:
The interviewer complimented Luis on his preparation.
That was one of the nicest compliments I have received.
Please accept my compliments on a well-organized event.
Mia complimented the server on the excellent service.
Both words together:
The scarf complements your coat, and I mean that as a compliment.
Their abilities complement each other, and their manager often compliments them on their teamwork.
Word History
Complement: The word is connected to a Latin root meaning to fill or complete. Its modern meanings still center on completion, fullness, enhancement, and things that form a whole together.
Compliment: This word ultimately shares the same distant Latin root, but it developed through other European languages and became associated with courtesy, respect, and praise.
The words once had more overlap than they do now. In modern standard English, their main meanings are separate. Use complement for completion or enhancement and compliment for praise or courtesy.
Phrases Containing
Complement:
- complement each other
- a perfect complement to
- a useful complement to
- a full complement of
- subject complement
- object complement
- complementary skills
- complementary colors
Compliment:
- pay someone a compliment
- give someone a compliment
- take it as a compliment
- return the compliment
- fishing for compliments
- backhanded compliment
- compliments of the chef
- with our compliments
FAQs
Complement means to complete, improve, balance, or work well with something. Compliment means praise or an approving remark. For example, a scarf may complement a coat, while a friend may compliment you on how the coat looks.
Use compliment when you praise a person. You might compliment someone on a presentation, haircut, outfit, or achievement. Use complement only when a person’s qualities, skills, or personality work well with someone else’s.
Both phrases are correct, but they mean different things. People or things complement each other when they form a balanced or effective combination. People compliment each other when they exchange praise or kind remarks.
Use complement when one color, fabric, or clothing item improves the appearance of another. For example, “The brown shoes complement the navy suit.” In color theory, the standard term is complementary colors, not complimentary colors.
A free item is complimentary. Hotels may offer complimentary breakfast, parking, or Wi-Fi. In this use, the word means provided without charge as a courtesy. Complementary means completing, matching, or working well together.
Connect the e in complement with the e in complete. A complement helps complete or improve something. Think of the i in compliment as referring to a positive comment someone gives another person. Checking whether the sentence means “complete” or “praise” usually reveals the correct choice.
Conclusion
Both complement and compliment are standard words, but they are not interchangeable.
Use complement when something completes, enhances, balances, or works well with something else. Use compliment for praise, admiration, approval, or courteous remarks.
Remember the spelling connection: a complement helps complete something. A compliment is a positive comment or act of praise.
