wine barrel vs wine cask

wine barrel and wine cask both are nouns.

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

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

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