arak vs hard drink

arak and hard drink both are nouns.

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

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

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

arak (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