overcomer vs controller

overcomer and controller both are nouns.

Word	Noun	Adjective	Verb	Adverb
overcomer	Yes	No	No	No
controller	Yes	No	No	No

As nouns, controller is a hypernym of overcomer; that is, controller is a word with a broader meaning than overcomer:

overcomer: someone who overcomes and establishes ascendancy and control by force or persuasion
controller: a person who directs and restrains

Other hypernyms of overcomer include restrainer.

overcomer (noun)	controller (noun)
someone who overcomes and establishes ascendancy and control by force or persuasion	a mechanism that controls the operation of a machine
	someone who maintains and audits business accounts
	a person who directs and restrains