Operation
Handling, Manipulation
noun
そうさ
捜査 (そうさ) Criminal Investigation, Manhunt
操作 (そうさ) Operation, Handling, Manipulation
捜索 (そうさく) Search, Investigation
作用 (さよう) Effect, Action, Operation
作業 (さぎょう) Work, Task, Operation
Words with 作 read as サ have Operation as a meaning.