hard drink vs strong drink

hard drink and strong drink both are nouns.

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

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

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

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

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