relay station vs booster

relay station and booster both are nouns.

Word	Noun	Adjective	Verb	Adverb
relay station	Yes	No	No	No
booster	Yes	No	No	No

As nouns, relay station and booster are synonyms defined as:

relay station and booster: an amplifier for restoring the strength of a transmitted signal

Other synonyms of relay station include booster amplifier, booster station, relay link, relay transmitter.

relay station (noun)	booster (noun)
an amplifier for restoring the strength of a transmitted signal	an additional dose that makes sure the first dose was effective
	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.