Irish whisky vs Irish whiskey

Irish whisky and Irish whiskey both are nouns.

Word	Noun	Adjective	Verb	Adverb
Irish whisky	Yes	No	No	No
Irish whiskey	Yes	No	No	No

As nouns, Irish whisky and Irish whiskey are synonyms defined as:

Irish whisky and Irish whiskey: whiskey made in Ireland chiefly from barley

Other synonyms of Irish whisky include Irish.

Irish whisky (noun)	Irish whiskey (noun)
whiskey made in Ireland chiefly from barley	whiskey made in Ireland chiefly from barley