Graminaceae vs Gramineae

Graminaceae and Gramineae both are nouns.

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

As nouns, Graminaceae and Gramineae are synonyms defined as:

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

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

Graminaceae (noun)	Gramineae (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