fritillary vs nymphalid

fritillary and nymphalid both are nouns.

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

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

fritillary: butterfly with brownish wings marked with black and silver
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 fritillary include brush-footed butterfly, four-footed butterfly, nymphalid butterfly.

fritillary (noun)	nymphalid (noun)
butterfly with brownish wings marked with black and silver	medium to large butterflies found worldwide typically having brightly colored wings and much-reduced nonfunctional forelegs carried folded on the breast
any liliaceous plant of the genus Fritillaria having nodding variously colored flowers