andrena vs bee

andrena and bee both are nouns.

Word	Noun	Adjective	Verb	Adverb
andrena	Yes	No	No	No
bee	Yes	No	No	No

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

andrena: a bee that is a member of the genus Andrena
bee: any of numerous hairy-bodied insects including social and solitary species

andrena (noun)	bee (noun)
a bee that is a member of the genus Andrena	any of numerous hairy-bodied insects including social and solitary species
	a social gathering to carry out some communal task or to hold competitions