fish-fly vs neuropterous insect

fish-fly and neuropterous insect both are nouns.

Word	Noun	Adjective	Verb	Adverb
fish-fly	Yes	No	No	No
neuropterous insect	Yes	No	No	No

As nouns, neuropterous insect is a hypernym of fish-fly; that is, neuropterous insect is a word with a broader meaning than fish-fly:

fish-fly: similar to but smaller than the dobsonfly; larvae are used as fishing bait
neuropterous insect: insect having biting mouthparts and four large membranous wings with netlike veins

Other hypernyms of fish-fly include neuropteran, neuropteron.

fish-fly (noun)	neuropterous insect (noun)
similar to but smaller than the dobsonfly; larvae are used as fishing bait	insect having biting mouthparts and four large membranous wings with netlike veins