investigator Synonyms

police detective detective researcher research worker TEC holmes secret agent querier pollster psychiatrist evaluator trier tracker tracer tester searcher seeker sleeper sleuth sleuthhound sociologist spy studier surveyor tail psychoanalyst gumshoe scanner sherlock sleuthing snooper investigation officer examining magistrate investigators investigating officer researchers revenuer psychotherapist postdoctoral dick private detective private investigator hawkshaw plainclothesman private eye shamus prober detectives agent checkers