curassow vs gallinaceous bird

curassow and gallinaceous bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
curassow	Yes	No	No	No
gallinaceous bird	Yes	No	No	No

As nouns, gallinaceous bird is a hypernym of curassow; that is, gallinaceous bird 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
gallinaceous bird: heavy-bodied largely ground-feeding domestic or game birds

Other hypernyms of curassow include gallinacean.

curassow (noun)	gallinaceous bird (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