genus Zea vs family Graminaceae

genus Zea and family Graminaceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Zea	Yes	No	No	No
family Graminaceae	Yes	No	No	No

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