1) Closing 2) Completing 3) Completion 4) Culmination 5) Finalisation 6) Mop up 7) The act of finalizing 8) Windup 1) Finalisation 
In object-oriented programming, finalization is the process of preparing an object for deallocation; strictly speaking, finalization is all parts of object destruction until memory deallocation itself. Finalization is formally complementary to initialization, which is the part of object creation that follows allocation, but differs significantly i...
[n] - the act of finalizing
finalisation noun the act of finalizing