exploitation vs mistreatment

exploitation and mistreatment both are nouns.

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

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

exploitation: an act that exploits or victimizes someone (treats them unfairly)
mistreatment: the practice of treating (someone or something) badly

exploitation (noun)	mistreatment (noun)
the act of making some area of land or water more profitable or productive or useful	the practice of treating (someone or something) badly
an act that exploits or victimizes someone (treats them unfairly)