Bromus vs Gramineae

Bromus and Gramineae both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bromus	Yes	No	No	No
Gramineae	Yes	No	No	No

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