grass family vs genus Aegilops

grass family and genus Aegilops both are nouns.

Word	Noun	Adjective	Verb	Adverb
grass family	Yes	No	No	No
genus Aegilops	Yes	No	No	No

grass family (noun)	genus Aegilops (noun)
the grasses: chiefly herbaceous but some woody plants including cereals, bamboo, reeds, sugar cane	goat grass