great bowerbird vs bowerbird

great bowerbird and bowerbird both are nouns.

Word	Noun	Adjective	Verb	Adverb
great bowerbird	Yes	No	No	No
bowerbird	Yes	No	No	No

As nouns, bowerbird is a hypernym of great bowerbird; that is, bowerbird is a word with a broader meaning than great bowerbird:

great bowerbird: large bowerbird of northern Australia
bowerbird: any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females

Other hypernyms of great bowerbird include catbird.

great bowerbird (noun)	bowerbird (noun)
large bowerbird of northern Australia	any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females