Synonyms:
* Famous person: This is a very general and straightforward synonym.
* Star: This is often used to refer to someone famous in the entertainment industry.
* Icon: This implies someone who is highly respected and influential.
* Notable: This means someone who is well-known and admired.
* Big name: This is a more informal synonym, often used in the context of entertainment.
Antonyms:
* Unknown: This is the opposite of "celebrity" in the sense of not being famous.
* Unremarkable: This implies someone who is not noteworthy or interesting.
* Ordinary: This emphasizes the lack of fame and distinction.
* Anonymous: This refers to someone whose identity is not known or revealed.
* Unsung: This means someone who is deserving of fame but has not achieved it.
The best synonym or antonym to use will depend on the specific context in which you are using the word "celebrity."