Gasteropoda vs class Gastropoda

Gasteropoda and class Gastropoda both are nouns.

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

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

Other synonyms of Gasteropoda include class Gasteropoda, Gastropoda.

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