crow blackbird vs grackle

crow blackbird and grackle both are nouns.

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

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

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

crow blackbird (noun)	grackle (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