order Diapensiales vs class Magnoliopsida

order Diapensiales and class Magnoliopsida both are nouns.

Word	Noun	Adjective	Verb	Adverb
order Diapensiales	Yes	No	No	No
class Magnoliopsida	Yes	No	No	No

order Diapensiales (noun)	class Magnoliopsida (noun)
used in some classifications: coextensive with family Diapensiaceae	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