Gasteropoda vs class Gasteropoda

Gasteropoda and class Gasteropoda both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gasteropoda	Yes	No	No	No
class Gasteropoda	Yes	No	No	No

As nouns, Gasteropoda and class Gasteropoda are synonyms defined as:

Other synonyms of Gasteropoda include class Gastropoda, Gastropoda.

Gasteropoda (noun)	class Gasteropoda (noun)
snails and slugs and their relatives	snails and slugs and their relatives