relay station vs relay link

relay station and relay link both are nouns.

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

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

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

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

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