Poaceae vs order Graminales

Poaceae and order Graminales both are nouns.

Word	Noun	Adjective	Verb	Adverb
Poaceae	Yes	No	No	No
order Graminales	Yes	No	No	No

Poaceae (noun)	order Graminales (noun)
the grasses: chiefly herbaceous but some woody plants including cereals, bamboo, reeds, sugar cane	grasses, sedges, rushes