WordNet sense 1 (a payment of money sent to a person in another place):

remittance, remitment, remittal

WordNet sense 2 (an abatement in intensity or degree (as in the manifestations of a disease)):

subsidence

WordNet sense 3 ((law) the act of remitting (especially the referral of a law case to another court)):

remit

WordNet sense 4 (the act of absolving or remitting; formal redemption as pronounced by a priest in the sacrament of penance):

absolution, remission of sin