garpike vs ganoid fish

garpike and ganoid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
garpike	Yes	No	No	No
ganoid fish	Yes	No	No	No

As nouns, ganoid fish is a hypernym of garpike; that is, ganoid fish is a word with a broader meaning than garpike:

garpike: primitive predaceous North American fish covered with hard scales and having long jaws with needlelike teeth
ganoid fish: primitive fishes having thick bony scales with a shiny covering

Other hypernyms of garpike include ganoid.

garpike (noun)	ganoid fish (noun)
primitive predaceous North American fish covered with hard scales and having long jaws with needlelike teeth	primitive fishes having thick bony scales with a shiny covering