trampoline vs exerciser

trampoline and exerciser both are nouns.

Word	Noun	Adjective	Verb	Adverb
trampoline	Yes	No	No	No
exerciser	Yes	No	No	No

As nouns, exerciser is a hypernym of trampoline; that is, exerciser is a word with a broader meaning than trampoline:

trampoline: gymnastic apparatus consisting of a strong canvas sheet attached with springs to a metal frame; used for tumbling
exerciser: sports equipment used in gymnastic exercises

Other hypernyms of trampoline include gymnastic apparatus.

trampoline (noun)	exerciser (noun)
gymnastic apparatus consisting of a strong canvas sheet attached with springs to a metal frame; used for tumbling	sports equipment used in gymnastic exercises