1) Abandonment 2) Cave of adullam 3) Cession 4) Defection 5) Dereliction 6) Desertion 7) Dispensation 8) Expropriation 9) Nolle prosequi 10) Quitclaim deed 11) Relinquishing 12) Renouncement 13) Renunciation 14) Resignation 15) Riddance 16) Secession 17) Surrender 18) Withdrawal 1) Ceding 2) Cession 3) Disuse 4) Handover 5) Relinquishing 6) Resignation 7) Waiver 
• (n.) The act of relinquishing.
Re·lin'quish·ment (-m e nt) noun The act of relinquishing. 
[n] - a verbal act of relinquishing 2. [n] - the act of relinquishing
relinquishment 1. The act of giving up and abandoning a struggle or s task, etc. 2. A verbal act of renouncing a claim, or a right, or a position, etc. 3. To retire from; to give up or to abandon. 4. To put aside or desist from (something practiced, professed, or intended). 5. To let go; to surrender. 6. To cease holding physically; to release...
relinquishing noun the act of giving up and abandoning a struggle or task etc.