Poaceae vs family Poaceae

Poaceae and family Poaceae both are nouns.

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

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

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

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

Poaceae (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