megapode vs mound bird

megapode and mound bird both are nouns.

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

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

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

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

megapode (noun)	mound bird (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