promoter vs booster

promoter and booster both are nouns.

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

As nouns, promoter and booster are synonyms defined as:

Other synonyms of promoter include plugger.

promoter (noun)	booster (noun)
someone who is an active supporter and advocate	an additional dose that makes sure the first dose was effective
a sponsor who books and stages public entertainments	the first stage of a multistage rocket
	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.