investigation Synonyms

investigating probe scrutiny searching search seeking sifting pervestigation study surveying survey tabularization test scouting science review probation probing pursual quest questioning quiz quizzing reconnaissance reinvestigate research testing teste opinion poll witch-hunt checkup monitoring snoopiness fact-finding postoperative questionnaire shufti sleuthing surveys manhunt once-over rehearing treatment trial inspection debriefing field sport vetting case study literary criticism