bluebill vs broadbill

bluebill and broadbill both are nouns.

Word	Noun	Adjective	Verb	Adverb
bluebill	Yes	No	No	No
broadbill	Yes	No	No	No

As nouns, bluebill and broadbill are synonyms defined as:

bluebill and broadbill: diving ducks of North America having a bluish-grey bill

Other synonyms of bluebill include scaup, scaup duck.

bluebill (noun)	broadbill (noun)
diving ducks of North America having a bluish-grey bill	small birds of the Old World tropics having bright plumage and short wide bills
	freshwater duck of the Northern Hemisphere having a broad flat bill
	diving ducks of North America having a bluish-grey bill
	tropical American heron related to night herons