123 entries under noun topic. ×

4
experimenter
4
scientist(person, search, expert, first)
4
tester(person, agent, hound, monitor)
3
checker
3
discoverer(person, search, first)
3
examinant(person, search, first)
3
operative(plant, agent, mole, gumshoe)
3
pathfinder(person, search, first)
3
prober(person, investigate, ask, agent)
3
quester(person, investigate, ask, agent)
3
watcher(person, plant, search, agent)
2
agent(person, plant, shadow, operative)
2
analyzer
2
assayer
2
auditor
2
evaluator(examiner, questioner)
2
interrogator(tester, examiner, regulator, questioner)
2
observer(plant, agent, operative, informer)
2
pioneer(person, search, first)
2
plainclothesman(gumshoe, detective, sleuth)
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APASmart Define. (2015). investigator thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/investigator/thesaurus/synonyms
ChicagoSmart Define. 2015. "investigator thesaurus" https://smartdefine.org/investigator/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, investigator thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/investigator/thesaurus/synonyms>.
MLASmart Define. "investigator thesaurus" 17 December 2015. Web. 1 October 2026. <https://smartdefine.org/investigator/thesaurus/synonyms>