subclass Dilleniidae vs class Magnoliopsida

subclass Dilleniidae and class Magnoliopsida both are nouns.

Word	Noun	Adjective	Verb	Adverb
subclass Dilleniidae	Yes	No	No	No
class Magnoliopsida	Yes	No	No	No

subclass Dilleniidae (noun)	class Magnoliopsida (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	comprising seed plants that produce an embryo with paired cotyledons and net-veined leaves; divided into six (not always well distinguished) subclasses (or superorders): Magnoliidae and Hamamelidae (considered primitive), Caryophyllidae (an early and distinctive offshoot), and three more or less advanced groups: Dilleniidae, Rosidae, Asteridae