extortionist vs extortioner

extortionist and extortioner both are nouns.

Word	Noun	Adjective	Verb	Adverb
extortionist	Yes	No	No	No
extortioner	Yes	No	No	No

As nouns, extortionist and extortioner are synonyms defined as:

extortionist and extortioner: a criminal who extorts money from someone by threatening to expose embarrassing information about them

Other synonyms of extortionist include blackmailer.

extortionist (noun)	extortioner (noun)
a criminal who extorts money from someone by threatening to expose embarrassing information about them	a criminal who extorts money from someone by threatening to expose embarrassing information about them