Dilleniidae vs class Dicotyledones

Dilleniidae and class Dicotyledones both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dilleniidae	Yes	No	No	No
class Dicotyledones	Yes	No	No	No

Dilleniidae (noun)	class Dicotyledones (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