hymenopterous insect vs hymenopter

hymenopterous insect and hymenopter both are nouns.

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

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

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

Other synonyms of hymenopterous insect include hymenopteran, hymenopteron.

hymenopterous insect (noun)	hymenopter (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