Gramineae vs family Poaceae

Gramineae and family Poaceae both are nouns.

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

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

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

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

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