ouzo vs hard liquor

ouzo and hard liquor both are nouns.

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

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

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

ouzo (noun)	hard liquor (noun)
a Greek liquor flavored with anise	an alcoholic beverage that is distilled rather than fermented