urinator vs wetter

urinator and wetter both are nouns.

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

As nouns, wetter is a hyponym of urinator; that is, wetter is a word with a more specific, narrower meaning than urinator:

urinator: a person who urinates
wetter: someone suffering from enuresis; someone who urinates while asleep in bed

Other hyponyms of urinator include bed wetter, bedwetter.

urinator (noun)	wetter (noun)
a person who urinates	a workman who wets the work in a manufacturing process
	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