Polygonia comma vs comma butterfly

Polygonia comma and comma butterfly both are nouns.

Word	Noun	Adjective	Verb	Adverb
Polygonia comma	Yes	No	No	No
comma butterfly	Yes	No	No	No

As nouns, Polygonia comma and comma butterfly are synonyms defined as:

Polygonia comma and comma butterfly: anglewing butterfly with a comma-shaped mark on the underside of each hind wing

Other synonyms of Polygonia comma include comma.

Polygonia comma (noun)	comma butterfly (noun)
anglewing butterfly with a comma-shaped mark on the underside of each hind wing	anglewing butterfly with a comma-shaped mark on the underside of each hind wing