class Hirudinea vs hirudinean

class Hirudinea and hirudinean both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Hirudinea	Yes	No	No	No
hirudinean	Yes	No	No	No

class Hirudinea (noun)	hirudinean (noun)
hermaphroditic aquatic or terrestrial or parasitic annelids	carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end