hairstreak butterfly vs hairstreak

hairstreak butterfly and hairstreak both are nouns.

Word	Noun	Adjective	Verb	Adverb
hairstreak butterfly	Yes	No	No	No
hairstreak	Yes	No	No	No

As nouns, hairstreak butterfly and hairstreak are synonyms defined as:

hairstreak butterfly and hairstreak: small butterflies having striped markings under the wings

hairstreak butterfly (noun)	hairstreak (noun)
small butterflies having striped markings under the wings	small butterflies having striped markings under the wings