hard drink vs hard liquor

hard drink and hard liquor both are nouns.

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

As nouns, hard drink and hard liquor are synonyms defined as:

hard drink and hard liquor: an alcoholic beverage that is distilled rather than fermented

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

hard drink (noun)	hard liquor (noun)
an alcoholic beverage that is distilled rather than fermented	an alcoholic beverage that is distilled rather than fermented