surmounter vs controller

surmounter and controller both are nouns.

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

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

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

Other hypernyms of surmounter include restrainer.

surmounter (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