Poaceae vs grass family

Poaceae and grass family both are nouns.

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

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

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

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

Poaceae (noun)	grass family (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