6
inquirer(noun, person, investigate, ask)
6
questioner(noun, person, investigate, ask, agent)
5
inquisitor(noun, person, investigate, ask, agent)
4
examiner
4
interrogator(noun, tester, examiner, questioner, auditor)
3
investigator(noun, person, investigate, ask, agent)
3
quester(noun, person, investigate, ask, agent)
3
researcher(noun, person, investigate, ask, agent)
2
checker
2
searcher
2
tester
2
trier
1
assayer
1
auditor
1
canvasser
1
detective
1
fathomer
1
penetrator
1
piercer
1
plumber
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APASmart Define. (2015). prober thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/prober/thesaurus/synonyms
ChicagoSmart Define. 2015. "prober thesaurus" https://smartdefine.org/prober/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, prober thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/prober/thesaurus/synonyms>.
MLASmart Define. "prober thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/prober/thesaurus/synonyms>