rosid dicot family vs subclass Rosidae

rosid dicot family and subclass Rosidae both are nouns.

Word	Noun	Adjective	Verb	Adverb
rosid dicot family	Yes	No	No	No
subclass Rosidae	Yes	No	No	No

rosid dicot family (noun)	subclass Rosidae (noun)
a family of dicotyledonous plants	a group of trees and shrubs and herbs mostly with polypetalous flowers; contains 108 families including Rosaceae, Crassulaceae, Myrtaceae, Melastomaceae, Euphorbiaceae, Umbelliferae