Avena vs Graminaceae

Avena and Graminaceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
Avena	Yes	No	No	No
Graminaceae	Yes	No	No	No

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