family Poaceae vs Phleum

family Poaceae and Phleum both are nouns.

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

family Poaceae (noun)	Phleum (noun)
the grasses: chiefly herbaceous but some woody plants including cereals, bamboo, reeds, sugar cane	grasses native to temperate regions