toper vs imbiber

toper and imbiber both are nouns.

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

As nouns, toper and imbiber are synonyms defined as:

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

Other synonyms of toper include drinker, juicer.

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