viceroy vs Limenitis archippus

viceroy and Limenitis archippus both are nouns.

Word	Noun	Adjective	Verb	Adverb
viceroy	Yes	No	No	No
Limenitis archippus	Yes	No	No	No

As nouns, viceroy and Limenitis archippus are synonyms defined as:

viceroy and Limenitis archippus: showy American butterfly resembling the monarch but smaller

viceroy (noun)	Limenitis archippus (noun)
showy American butterfly resembling the monarch but smaller	showy American butterfly resembling the monarch but smaller
governor of a country or province who rules as the representative of his or her king or sovereign