bee vs hymenopterous insect

bee and hymenopterous insect both are nouns.

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

As nouns, hymenopterous insect is a hypernym of bee; that is, hymenopterous insect is a word with a broader meaning than bee:

bee: any of numerous hairy-bodied insects including social and solitary species
hymenopterous insect: insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing

Other hypernyms of bee include hymenopter, hymenopteran, hymenopteron.

bee (noun)	hymenopterous insect (noun)
any of numerous hairy-bodied insects including social and solitary species	insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing
a social gathering to carry out some communal task or to hold competitions