Gramineae vs Graminaceae

Gramineae and Graminaceae both are nouns.

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

As nouns, Gramineae and Graminaceae are synonyms defined as:

Gramineae and Graminaceae: 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, grass family, Poaceae.

Gramineae (noun)	Graminaceae (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