Link trainer vs trainer

Link trainer and trainer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Link trainer	Yes	No	No	No
trainer	Yes	No	No	No

As nouns, trainer is a hypernym of Link trainer; that is, trainer is a word with a broader meaning than Link trainer:

Link trainer: an early form of flight simulator
trainer: simulator consisting of a machine on the ground that simulates the conditions of flying a plane

Other hypernyms of Link trainer include flight simulator.

Link trainer (noun)	trainer (noun)
an early form of flight simulator	simulator consisting of a machine on the ground that simulates the conditions of flying a plane
	one who trains other persons or animals