Gramineae vs Poaceae

Gramineae and Poaceae both are nouns.

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

As nouns, Gramineae and Poaceae are synonyms defined as:

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

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

Gramineae (noun)	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