neuropterous insect vs neuropteran

neuropterous insect and neuropteran both are nouns.

Word	Noun	Adjective	Verb	Adverb
neuropterous insect	Yes	No	No	No
neuropteran	Yes	No	No	No

As nouns, neuropterous insect and neuropteran are synonyms defined as:

neuropterous insect and neuropteran: insect having biting mouthparts and four large membranous wings with netlike veins

Other synonyms of neuropterous insect include neuropteron.

neuropterous insect (noun)	neuropteran (noun)
insect having biting mouthparts and four large membranous wings with netlike veins	insect having biting mouthparts and four large membranous wings with netlike veins