firebird vs Baltimore bird

firebird and Baltimore bird both are nouns.

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

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

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

firebird (noun)	Baltimore bird (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