corn whiskey vs whiskey

corn whiskey and whiskey both are nouns.

Word	Noun	Adjective	Verb	Adverb
corn whiskey	Yes	No	No	No
whiskey	Yes	No	No	No

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

corn whiskey: whiskey distilled from a mash of not less than 80 percent corn
whiskey: a liquor made from fermented mash of grain

Other hypernyms of corn whiskey include whisky.

corn whiskey (noun)	whiskey (noun)
whiskey distilled from a mash of not less than 80 percent corn	a liquor made from fermented mash of grain