booster vs cheerleader

booster and cheerleader both are nouns.

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

As nouns, cheerleader is a hyponym of booster; that is, cheerleader is a word with a more specific, narrower meaning than booster:

booster (noun)	cheerleader (noun)
an additional dose that makes sure the first dose was effective	someone who leads the cheers by spectators at a sporting event
the first stage of a multistage rocket	an enthusiastic and vocal supporter
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.