Graminaceae vs genus Saccharum

Graminaceae and genus Saccharum both are nouns.

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

Graminaceae (noun)	genus Saccharum (noun)
the grasses: chiefly herbaceous but some woody plants including cereals, bamboo, reeds, sugar cane	tall perennial reedlike grass originally of southeastern Asia: sugarcane