Avena vs grass family

Avena and grass family both are nouns.

Word	Noun	Adjective	Verb	Adverb
Avena	Yes	No	No	No
grass family	Yes	No	No	No

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