malt whiskey vs Scotch whisky

malt whiskey and Scotch whisky both are nouns.

Word	Noun	Adjective	Verb	Adverb
malt whiskey	Yes	No	No	No
Scotch whisky	Yes	No	No	No

As nouns, malt whiskey and Scotch whisky are synonyms defined as:

malt whiskey and Scotch whisky: whiskey distilled in Scotland; especially whiskey made from malted barley in a pot still

Other synonyms of malt whiskey include malt whisky, Scotch, Scotch malt whiskey, Scotch malt whisky, Scotch whiskey.

malt whiskey (noun)	Scotch whisky (noun)
whiskey distilled in Scotland; especially whiskey made from malted barley in a pot still	whiskey distilled in Scotland; especially whiskey made from malted barley in a pot still