sour mash vs whiskey

sour mash and whiskey both are nouns.

Word	Noun	Adjective	Verb	Adverb
sour mash	Yes	No	No	No
whiskey	Yes	No	No	No

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

Other hypernyms of sour mash include whisky.

sour mash (noun)	whiskey (noun)
any whiskey distilled from sour mash	a liquor made from fermented mash of grain
a mash with optimum acidity for yeast fermentation; a mixture of old and new mash; used in distilling some whiskeys