schnapps vs hard liquor

schnapps and hard liquor both are nouns.

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

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

schnapps: 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 schnapps include booze, hard drink, John Barleycorn, liquor, spirits, strong drink.

schnapps (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