WordNet sense 1 (something that is lost or surrendered as a penalty):

forfeiture

WordNet sense 2 (lose or lose the right to by some error, offense, or crime):

forgo, waive, give up, throw overboard

WordNet sense 3 (surrendered as a penalty):

confiscate, forfeited

WordNet sense 4 (not gained or won):

lost

WordNet sense 5 (the act of losing or surrendering something as a penalty for a mistake or fault or failure to perform etc.):

sacrifice