strong drink vs hard liquor

strong drink and hard liquor both are nouns.

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

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

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

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

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