alcoholic vs drunk

alcoholic and drunk both are nouns.

Word	Noun	Adjective	Verb	Adverb
alcoholic	Yes	Yes	No	No
drunk	Yes	Yes	No	No

As nouns, drunk is a hypernym of alcoholic; that is, drunk is a word with a broader meaning than alcoholic:

Other hypernyms of alcoholic include drunkard, inebriate, rummy, sot, wino.

alcoholic (noun)	drunk (noun)
a person who drinks alcohol to excess habitually	a chronic drinker
	someone who is intoxicated

alcoholic (adjective)	drunk (adjective)
characteristic of or containing alcohol	stupefied or excited by a chemical substance (especially alcohol)
addicted to alcohol	as if under the influence of alcohol