mound bird vs megapode

mound bird and megapode both are nouns.

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

As nouns, mound bird and megapode are synonyms defined as:

mound bird and megapode: large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs

Other synonyms of mound bird include mound-bird, mound builder, scrub fowl.

mound bird (noun)	megapode (noun)
large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs	large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs