family Graminaceae vs grass family

family Graminaceae and grass family both are nouns.

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

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

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

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

family Graminaceae (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