bluebird vs fairy bluebird

bluebird and fairy bluebird both are nouns.

Word	Noun	Adjective	Verb	Adverb
bluebird	Yes	No	No	No
fairy bluebird	Yes	No	No	No

As nouns, bluebird and fairy bluebird are synonyms defined as:

bluebird and fairy bluebird: fruit-eating mostly brilliant blue songbird of the East Indies

bluebird (noun)	fairy bluebird (noun)
blue North American songbird	fruit-eating mostly brilliant blue songbird of the East Indies
fruit-eating mostly brilliant blue songbird of the East Indies