schnaps vs hard liquor

schnaps and hard liquor both are nouns.

Word	Noun	Adjective	Verb	Adverb
schnaps	Yes	No	No	No
hard liquor	Yes	No	No	No

As nouns, hard liquor is a hypernym of schnaps; that is, hard liquor is a word with a broader meaning than schnaps:

schnaps: any of various strong liquors especially a Dutch spirit distilled from potatoes
hard liquor: an alcoholic beverage that is distilled rather than fermented

Other hypernyms of schnaps include booze, hard drink, John Barleycorn, liquor, spirits, strong drink.

schnaps (noun)	hard liquor (noun)
any of various strong liquors especially a Dutch spirit distilled from potatoes	an alcoholic beverage that is distilled rather than fermented