Completion

[Little_Girl]

The act or process of making complete; the getting
through to the end; as, the completion of an undertaking, an education,
a service.

[Sonia]

the finishing of an gigantic square pyramid consisting of 22 bricks, but must be at over 9000s stories high.

[Becky]

The action or process of completing or finishing something.

[Sonia]

the act of finishing something that you are doing or making:

[Jason Yan]

Completion in American Football. A pass that is successfully caught by an eligible receiver.