Sitophylus oryzae vs weevil

Sitophylus oryzae and weevil both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sitophylus oryzae	Yes	No	No	No
weevil	Yes	No	No	No

As nouns, weevil is a hypernym of Sitophylus oryzae; that is, weevil is a word with a broader meaning than Sitophylus oryzae:

Sitophylus oryzae: brown weevil that infests stored grain especially rice
weevil: any of several families of mostly small beetles that feed on plants and plant products; especially snout beetles and seed beetles

Sitophylus oryzae (noun)	weevil (noun)
brown weevil that infests stored grain especially rice	any of several families of mostly small beetles that feed on plants and plant products; especially snout beetles and seed beetles