wine cask vs wine barrel

wine cask and wine barrel both are nouns.

Word	Noun	Adjective	Verb	Adverb
wine cask	Yes	No	No	No
wine barrel	Yes	No	No	No

As nouns, wine cask and wine barrel are synonyms defined as:

wine cask (noun)	wine barrel (noun)
a barrel that holds wine	a barrel that holds wine