捜査【そうさ】
search (esp. in criminal investigations), investigation, inquiry, enquiry
調査【ちょうさ】
investigation, examination, inquiry, enquiry, survey
検査【けんさ】
inspection (e.g. customs, factory), examination, test, check, scan (e.g. MRI, PET), audit
審査【しんさ】
judging, inspection, examination, investigation, review
査察【ささつ】
inspection (for compliance), investigation (tax, etc.)
巡査【じゅんさ】
police officer, policeman, constable
監査【かんさ】
inspection, audit, judgement, judgment
査定【さてい】
assessment (of value, damages, etc.), revision (of a budget)
査問【さもん】
inquiry, enquiry, hearing