Baltimore bird vs hangbird

Baltimore bird and hangbird both are nouns.

Word	Noun	Adjective	Verb	Adverb
Baltimore bird	Yes	No	No	No
hangbird	Yes	No	No	No

As nouns, Baltimore bird and hangbird are synonyms defined as:

Other synonyms of Baltimore bird include Baltimore oriole, firebird, Icterus galbula galbula.

Baltimore bird (noun)	hangbird (noun)
eastern subspecies of northern oriole	eastern subspecies of northern oriole