pierid butterfly vs pierid

pierid butterfly and pierid both are nouns.

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

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

pierid butterfly and pierid: any of numerous pale-colored butterflies having three pairs of well-developed legs

pierid butterfly (noun)	pierid (noun)
any of numerous pale-colored butterflies having three pairs of well-developed legs	any of numerous pale-colored butterflies having three pairs of well-developed legs