relay station vs booster amplifier

relay station and booster amplifier both are nouns.

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

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

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

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

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