Baltimore bird vs firebird

Baltimore bird and firebird both are nouns.

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

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

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

Baltimore bird (noun)	firebird (noun)
eastern subspecies of northern oriole	eastern subspecies of northern oriole
	the male is bright red with black wings and tail
	tropical American flycatcher found as far north as southern Texas and Arizona; adult male has bright scarlet and black plumage