subclass Dilleniidae vs order Santalales

subclass Dilleniidae and order Santalales both are nouns.

Word	Noun	Adjective	Verb	Adverb
subclass Dilleniidae	Yes	No	No	No
order Santalales	Yes	No	No	No

subclass Dilleniidae (noun)	order Santalales (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	order of plants distinguished by having a one-celled inferior ovary; many are parasitic or partly parasitic usually on roots