Lepus vs mammal genus

Lepus and mammal genus both are nouns.

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

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

Lepus (noun)	mammal genus (noun)
type genus of the Leporidae: hares	a genus of mammals
a constellation in the Southern Hemisphere near Orion and Columba