litter lout vs litterer

litter lout and litterer both are nouns.

Word	Noun	Adjective	Verb	Adverb
litter lout	Yes	No	No	No
litterer	Yes	No	No	No

As nouns, litter lout and litterer are synonyms defined as:

litter lout and litterer: a person who litters public places with refuse

Other synonyms of litter lout include litterbug.

litter lout (noun)	litterer (noun)
a person who litters public places with refuse	a person who litters public places with refuse