mound bird vs gallinaceous bird

mound bird and gallinaceous bird both are nouns.

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

As nouns, gallinaceous bird is a hypernym of mound bird; that is, gallinaceous bird is a word with a broader meaning than mound bird:

mound bird: large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs
gallinaceous bird: heavy-bodied largely ground-feeding domestic or game birds

Other hypernyms of mound bird include gallinacean.

mound bird (noun)	gallinaceous bird (noun)
large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs	heavy-bodied largely ground-feeding domestic or game birds