Bos vs mammal genus

Bos and mammal genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bos	Yes	No	No	No
mammal genus	Yes	No	No	No

As nouns, mammal genus is a hypernym of Bos; that is, mammal genus is a word with a broader meaning than Bos:

Bos: wild and domestic cattle; in some classifications placed in the subfamily Bovinae or tribe Bovini
mammal genus: a genus of mammals

Bos (noun)	mammal genus (noun)
wild and domestic cattle; in some classifications placed in the subfamily Bovinae or tribe Bovini	a genus of mammals