Definify.com

Webster 1913 Edition

Noun.

One who poisons.

Shak.

Noun.

One who poisons or corrupts; that which corrupts.

poisoner ‎(plural poisoners)

person who poisons something or someone

Norman: empouaîsonneux m
Russian: отрави́тель (ru) m ‎(otravítelʹ), отрави́тельница (ru) f ‎(otravítelʹnica)