family Gramineae vs family Poaceae

family Gramineae and family Poaceae both are nouns.

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

As nouns, family Gramineae and family Poaceae are synonyms defined as:

family Gramineae and family Poaceae: the grasses: chiefly herbaceous but some woody plants including cereals, bamboo, reeds, sugar cane

Other synonyms of family Gramineae include family Graminaceae, Graminaceae, Gramineae, grass family, Poaceae.

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