grackle vs crow blackbird

grackle and crow blackbird both are nouns.

Word	Noun	Adjective	Verb	Adverb
grackle	Yes	No	No	No
crow blackbird	Yes	No	No	No

As nouns, grackle and crow blackbird are synonyms defined as:

grackle and crow blackbird: long-tailed American blackbird having iridescent black plumage

grackle (noun)	crow blackbird (noun)
long-tailed American blackbird having iridescent black plumage	long-tailed American blackbird having iridescent black plumage
glossy black Asiatic starling often taught to mimic speech