order Pulmonata vs class Gastropoda

order Pulmonata and class Gastropoda both are nouns.

Word	Noun	Adjective	Verb	Adverb
order Pulmonata	Yes	No	No	No
class Gastropoda	Yes	No	No	No

order Pulmonata (noun)	class Gastropoda (noun)
large order of gastropods usually breathing by means of a lung-like sac comprising most land snails and slugs and many freshwater snails	snails and slugs and their relatives