mound builder vs scrub fowl

mound builder and scrub fowl both are nouns.

Word	Noun	Adjective	Verb	Adverb
mound builder	Yes	No	No	No
scrub fowl	Yes	No	No	No

As nouns, mound builder and scrub fowl are synonyms defined as:

mound builder and scrub fowl: large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs

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

mound builder (noun)	scrub fowl (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