wetter vs bed wetter

wetter and bed wetter both are nouns.

Word	Noun	Adjective	Verb	Adverb
wetter	Yes	No	No	No
bed wetter	Yes	No	No	No

As nouns, wetter and bed wetter are synonyms defined as:

wetter and bed wetter: someone suffering from enuresis; someone who urinates while asleep in bed

Other synonyms of wetter include bedwetter.

wetter (noun)	bed wetter (noun)
a workman who wets the work in a manufacturing process	someone suffering from enuresis; someone who urinates while asleep in bed
someone suffering from enuresis; someone who urinates while asleep in bed
a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved