subclass Magnoliidae vs magnoliid dicot genus

subclass Magnoliidae and magnoliid dicot genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
subclass Magnoliidae	Yes	No	No	No
magnoliid dicot genus	Yes	No	No	No

subclass Magnoliidae (noun)	magnoliid dicot genus (noun)
a group of families of trees and shrubs and herbs having well-developed perianths and apocarpous ovaries and generally regarded as the most primitive extant flowering plants; contains 36 families including Magnoliaceae and Ranunculaceae; sometimes classified as a superorder	genus of dicotyledonous flowering plants regarded as among the most primitive of extant angiosperms