Gastropoda vs class Gastropoda

Gastropoda and class Gastropoda both are nouns.

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

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

Other synonyms of Gastropoda include class Gasteropoda, Gasteropoda.

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