mangler vs doer

mangler and doer both are nouns.

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

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

Other hypernyms of mangler include actor, worker.

mangler (noun)	doer (noun)
a person who mutilates or destroys or disfigures or cripples	a person who acts and gets things done