In General. In responding to a pleading, a party must affirmatively state any avoidance or affirmative defense, including:
• accord and satisfaction;
• arbitration and award;
• assumption of risk;
• contributory negligence;
• duress;
• estoppel;
• failure of consideration;
• fraud;
• illegality;
• injury by fellow servant;
• laches;
• license;
• payment;
• release;
• res judicata;
• statute of frauds;
• statute of limitations; and
• waiver.