arrack vs hard drink

arrack and hard drink both are nouns.

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

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

arrack: any of various strong liquors distilled from the fermented sap of toddy palms or from fermented molasses
hard drink: an alcoholic beverage that is distilled rather than fermented

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

arrack (noun)	hard drink (noun)
any of various strong liquors distilled from the fermented sap of toddy palms or from fermented molasses	an alcoholic beverage that is distilled rather than fermented