viceroy vs nymphalid butterfly

viceroy and nymphalid butterfly both are nouns.

Word	Noun	Adjective	Verb	Adverb
viceroy	Yes	No	No	No
nymphalid butterfly	Yes	No	No	No

As nouns, nymphalid butterfly is a hypernym of viceroy; that is, nymphalid butterfly is a word with a broader meaning than viceroy:

viceroy: showy American butterfly resembling the monarch but smaller
nymphalid butterfly: medium to large butterflies found worldwide typically having brightly colored wings and much-reduced nonfunctional forelegs carried folded on the breast

Other hypernyms of viceroy include brush-footed butterfly, four-footed butterfly, nymphalid.

viceroy (noun)	nymphalid butterfly (noun)
showy American butterfly resembling the monarch but smaller	medium to large butterflies found worldwide typically having brightly colored wings and much-reduced nonfunctional forelegs carried folded on the breast
governor of a country or province who rules as the representative of his or her king or sovereign