genus Oryza vs Graminaceae

genus Oryza and Graminaceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Oryza	Yes	No	No	No
Graminaceae	Yes	No	No	No

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