yellow-eyed grass family vs order Xyridales

yellow-eyed grass family and order Xyridales both are nouns.

Word	Noun	Adjective	Verb	Adverb
yellow-eyed grass family	Yes	No	No	No
order Xyridales	Yes	No	No	No

yellow-eyed grass family (noun)	order Xyridales (noun)
plants of tropical to temperate regions; usually in wet places	an order of monocotyledonous herbs