viceroy vs nymphalid

viceroy and nymphalid both are nouns.

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

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

viceroy: showy American butterfly resembling the monarch but smaller
nymphalid: 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 butterfly.

viceroy (noun)	nymphalid (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