urinator vs doer

urinator and doer both are nouns.

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

As nouns, doer is a hypernym of urinator; that is, doer is a word with a broader meaning than urinator:

Other hypernyms of urinator include actor, worker.

urinator (noun)	doer (noun)
a person who urinates	a person who acts and gets things done