booster amplifier vs relay transmitter

booster amplifier and relay transmitter both are nouns.

Word	Noun	Adjective	Verb	Adverb
booster amplifier	Yes	No	No	No
relay transmitter	Yes	No	No	No

As nouns, booster amplifier and relay transmitter are synonyms defined as:

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

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

booster amplifier (noun)	relay transmitter (noun)
an amplifier for restoring the strength of a transmitted signal	an amplifier for restoring the strength of a transmitted signal