subclass Dilleniidae vs dilleniid dicot genus

subclass Dilleniidae and dilleniid dicot genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
subclass Dilleniidae	Yes	No	No	No
dilleniid dicot genus	Yes	No	No	No

subclass Dilleniidae (noun)	dilleniid dicot genus (noun)
a group of families of more or less advanced trees and shrubs and herbs having either polypetalous or gamopetalous corollas and often with ovules attached to the walls of the ovary; contains 69 families including Ericaceae and Cruciferae and Malvaceae; sometimes classified as a superorder	genus of more or less advanced dicotyledonous trees and shrubs and herbs