curassow vs gallinacean

curassow and gallinacean both are nouns.

Word	Noun	Adjective	Verb	Adverb
curassow	Yes	No	No	No
gallinacean	Yes	No	No	No

As nouns, gallinacean is a hypernym of curassow; that is, gallinacean is a word with a broader meaning than curassow:

curassow: large crested arboreal game bird of warm parts of the Americas having long legs and tails; highly esteemed as game and food
gallinacean: heavy-bodied largely ground-feeding domestic or game birds

Other hypernyms of curassow include gallinaceous bird.

curassow (noun)	gallinacean (noun)
large crested arboreal game bird of warm parts of the Americas having long legs and tails; highly esteemed as game and food	heavy-bodied largely ground-feeding domestic or game birds