lowan vs megapode

lowan and megapode both are nouns.

Word	Noun	Adjective	Verb	Adverb
lowan	Yes	No	No	No
megapode	Yes	No	No	No

As nouns, megapode is a hypernym of lowan; that is, megapode is a word with a broader meaning than lowan:

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

Other hypernyms of lowan include mound-bird, mound bird, mound builder, scrub fowl.

lowan (noun)	megapode (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