class Monocotyledones vs order Alismales

class Monocotyledones and order Alismales both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Monocotyledones	Yes	No	No	No
order Alismales	Yes	No	No	No

class Monocotyledones (noun)	order Alismales (noun)
comprising seed plants that produce an embryo with a single cotyledon and parallel-veined leaves: includes grasses and lilies and palms and orchids; divided into four subclasses or superorders: Alismatidae, Arecidae, Commelinidae, and Liliidae	an order of aquatic monocotyledonous herbaceous plants