class Dicotyledonae vs monocot family

class Dicotyledonae and monocot family both are nouns.

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

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