family Graminaceae vs Aegilops

family Graminaceae and Aegilops both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Graminaceae	Yes	No	No	No
Aegilops	Yes	No	No	No

family Graminaceae (noun)	Aegilops (noun)
the grasses: chiefly herbaceous but some woody plants including cereals, bamboo, reeds, sugar cane	goat grass