admirer vs booster

admirer and booster both are nouns.

Word	Noun	Adjective	Verb	Adverb
admirer	Yes	No	No	No
booster	Yes	No	No	No

As nouns, admirer and booster are synonyms defined as:

Other synonyms of admirer include champion, friend, protagonist, supporter.

admirer (noun)	booster (noun)
someone who admires a young woman	an additional dose that makes sure the first dose was effective
a person who backs a politician or a team etc.	the first stage of a multistage rocket
a person who admires; someone who esteems or respects or approves	an amplifier for restoring the strength of a transmitted signal
	a thief who steals goods that are in a store
	someone who is an active supporter and advocate
	a person who backs a politician or a team etc.