drunken reveler vs drinker

drunken reveler and drinker both are nouns.

Word	Noun	Adjective	Verb	Adverb
drunken reveler	Yes	No	No	No
drinker	Yes	No	No	No

As nouns, drinker is a hypernym of drunken reveler; that is, drinker is a word with a broader meaning than drunken reveler:

Other hypernyms of drunken reveler include imbiber, juicer, toper.

drunken reveler (noun)	drinker (noun)
someone who engages in drinking bouts	a person who drinks alcoholic beverages (especially to excess)
	a person who drinks liquids