Scotch whiskey vs whisky

Scotch whiskey and whisky both are nouns.

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

As nouns, whisky is a hypernym of Scotch whiskey; that is, whisky is a word with a broader meaning than Scotch whiskey:

Scotch whiskey: whiskey distilled in Scotland; especially whiskey made from malted barley in a pot still
whisky: a liquor made from fermented mash of grain

Other hypernyms of Scotch whiskey include whiskey.

Scotch whiskey (noun)	whisky (noun)
whiskey distilled in Scotland; especially whiskey made from malted barley in a pot still	a liquor made from fermented mash of grain