accountant vs controller

accountant and controller both are nouns.

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

As nouns, accountant and controller are synonyms defined as:

accountant and controller: someone who maintains and audits business accounts

Other synonyms of accountant include comptroller.

accountant (noun)	controller (noun)
someone who maintains and audits business accounts	a mechanism that controls the operation of a machine
	someone who maintains and audits business accounts
	a person who directs and restrains