From The Collaborative International Dictionary of English v.0.44 [gcide]:
Offender \Of*fend"er\, noun One who offends; one who violates any law, divine or human; a wrongdoer.
I and my son Solomon shall be counted offenders. --1 Kings i. 21.
From WordNet (r) 2.0 [wn]:
noun
1: a person who transgresses moral or civil law [syn: {wrongdoer}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
19 Moby Thesaurus words for "offender": criminal, crook, culprit, delinquent, evil man, evil person, evildoer, felon, lawbreaker, malefactor, malfeasor, miscreant, misdemeanant, misdemeanist, misfeasor, outlaw, sinner, transgressor, wrongdoer
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