leipoa vs mound-bird

leipoa and mound-bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
leipoa	Yes	No	No	No
mound-bird	Yes	No	No	No

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

leipoa: Australian mound bird; incubates eggs naturally in sandy mounds
mound-bird: large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs

Other hypernyms of leipoa include megapode, mound bird, mound builder, scrub fowl.

leipoa (noun)	mound-bird (noun)
Australian mound bird; incubates eggs naturally in sandy mounds	large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs