cowrie vs gastropod

cowrie and gastropod both are nouns.

Word	Noun	Adjective	Verb	Adverb
cowrie	Yes	No	No	No
gastropod	Yes	No	No	No

As nouns, gastropod is a hypernym of cowrie; that is, gastropod is a word with a broader meaning than cowrie:

cowrie: any of numerous tropical marine gastropods of the genus Cypraea having highly polished usually brightly marked shells
gastropod: a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes

Other hypernyms of cowrie include univalve.

cowrie (noun)	gastropod (noun)
any of numerous tropical marine gastropods of the genus Cypraea having highly polished usually brightly marked shells	a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes