family Poaceae vs Cenchrus

family Poaceae and Cenchrus both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Poaceae	Yes	No	No	No
Cenchrus	Yes	No	No	No

family Poaceae (noun)	Cenchrus (noun)
the grasses: chiefly herbaceous but some woody plants including cereals, bamboo, reeds, sugar cane	a genus of grasses of the family Gramineae that have burs