1. One who offends or transgresses.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• ofender,
• offened,
• offeded,
• affender,
• ofenders,
• ofended,
• offeder,
• offented,
• offeners,
• offendor,
• officder,
• afender,
• offende,
• offenced,
• offendors,
• offerded,
• offendfer,
• affenders,
• offeneder,
• diffender

• offended,
• offending,
• offhanded,
• offhand,
• offend,
• offhandedly.

The adjective form of the word "offender" is "offensive".

The plural of the "offender" can be the "offenders".

The singular of the "offender" can be the "offender".