molester vs wrongdoer

molester and wrongdoer both are nouns.

Word	Noun	Adjective	Verb	Adverb
molester	Yes	No	No	No
wrongdoer	Yes	No	No	No

As nouns, wrongdoer is a hypernym of molester; that is, wrongdoer is a word with a broader meaning than molester:

molester: someone who subjects others to unwanted or improper sexual activities
wrongdoer: a person who transgresses moral or civil law

Other hypernyms of molester include offender.

molester (noun)	wrongdoer (noun)
someone who subjects others to unwanted or improper sexual activities	a person who transgresses moral or civil law