toper vs drinker

toper and drinker both are nouns.

Word	Noun	Adjective	Verb	Adverb
toper	Yes	No	No	No
drinker	Yes	No	No	No

As nouns, toper and drinker are synonyms defined as:

toper and drinker: a person who drinks alcoholic beverages (especially to excess)

Other synonyms of toper include imbiber, juicer.

toper (noun)	drinker (noun)
a person who drinks alcoholic beverages (especially to excess)	a person who drinks alcoholic beverages (especially to excess)
	a person who drinks liquids