relay link vs relay station

relay link and relay station both are nouns.

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

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

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

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

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