molestation vs mistreatment

molestation and mistreatment both are nouns.

Word	Noun	Adjective	Verb	Adverb
molestation	Yes	No	No	No
mistreatment	Yes	No	No	No

As nouns, mistreatment is a hypernym of molestation; that is, mistreatment is a word with a broader meaning than molestation:

molestation: the act of tormenting by continued persistent attacks and criticism
mistreatment: the practice of treating (someone or something) badly

molestation (noun)	mistreatment (noun)
the act of tormenting by continued persistent attacks and criticism	the practice of treating (someone or something) badly
the act of subjecting someone to unwanted or improper sexual advances or activity (especially women or children)