redbird vs cardinal grosbeak

redbird and cardinal grosbeak both are nouns.

Word	Noun	Adjective	Verb	Adverb
redbird	Yes	No	No	No
cardinal grosbeak	Yes	No	No	No

As nouns, redbird and cardinal grosbeak are synonyms defined as:

redbird and cardinal grosbeak: crested thick-billed North American finch having bright red plumage in the male

Other synonyms of redbird include cardinal, Cardinalis cardinalis, Richmondena Cardinalis.

redbird (noun)	cardinal grosbeak (noun)
crested thick-billed North American finch having bright red plumage in the male	crested thick-billed North American finch having bright red plumage in the male
the male is bright red with black wings and tail