The Collaborative International Dictionary of English v.0.48:

Acquittal \Ac*quit"tal\, n.
   1. The act of acquitting; discharge from debt or obligation;
      acquittance.
      [1913 Webster]

   2. (Law) A setting free, or deliverance from the charge of an
      offense, by verdict of a jury or sentence of a court.
      --Bouvier.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

68 Moby Thesaurus words for "acquittal":
   accordance, acquitment, acquittance, adherence, amortization,
   amortizement, binder, care, carrying out, cash, cash payment,
   clearance, compliance, condemnation, conformance, conformity,
   debt service, decision, defrayal, defrayment, deposit, disbursal,
   discharge, doling out, down payment, earnest, earnest money,
   execution, fulfillment, heed, heeding, hire purchase,
   hire purchase plan, installment, installment plan,
   interest payment, judgment, keeping, landmark decision,
   liquidation, monthly payments, never-never, observance,
   observation, paying, paying off, paying out, paying up, payment,
   payment in kind, payoff, penalty, performance, practice,
   prepayment, quarterly payments, quittance, regular payments,
   remittance, respect, retirement, satisfaction, sentence,
   settlement, sinking-fund payment, spot cash, verdict,
   weekly payments