class Dicotyledonae vs order Urticales

class Dicotyledonae and order Urticales both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Dicotyledonae	Yes	No	No	No
order Urticales	Yes	No	No	No

class Dicotyledonae (noun)	order Urticales (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	an order of dicotyledonous plants including Moraceae and Urticaceae and Ulmaceae