hymenopterous insect vs hymenopteran

hymenopterous insect and hymenopteran both are nouns.

Word	Noun	Adjective	Verb	Adverb
hymenopterous insect	Yes	No	No	No
hymenopteran	Yes	No	No	No

As nouns, hymenopterous insect and hymenopteran are synonyms defined as:

hymenopterous insect and hymenopteran: insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing

Other synonyms of hymenopterous insect include hymenopter, hymenopteron.

hymenopterous insect (noun)	hymenopteran (noun)
insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing	insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing