monocot family vs class Dicotyledonae

monocot family and class Dicotyledonae both are nouns.

Word	Noun	Adjective	Verb	Adverb
monocot family	Yes	No	No	No
class Dicotyledonae	Yes	No	No	No

monocot family (noun)	class Dicotyledonae (noun)
family of flowering plants having a single cotyledon (embryonic leaf) in the seed	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