The Collaborative International Dictionary of English v.0.48:

Sinner \Sin"ner\, n.
   One who has sinned; especially, one who has sinned without
   repenting; hence, a persistent and incorrigible transgressor;
   one condemned by the law of God.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sinner \Sin"ner\, v. i.
   To act as a sinner. [Humorous]
   [1913 Webster]

         Whether the charmer sinner it or saint it. --Pope.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sinner
    n 1: a person who sins (without repenting) [syn: sinner,
         evildoer]

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "sinner":
   bad person, criminal, crook, culprit, deceiver, delinquent,
   evil man, evil person, evildoer, felon, gangster, lawbreaker,
   malefactor, malevolent, malfeasant, malfeasor, miscreant,
   misdemeanant, misdemeanist, misfeasor, mobster, offender, outlaw,
   public enemy, racketeer, reprobate, thief, transgressor,
   trespasser, villain, worker of ill, wrongdoer