3
appraise(verb, study, get, check, consider)
3
audit(verb, study, check, consider, correct)
3
check up on(verb, expression, phrasal verb)
3
dispute(verb, get, run, oppose, fight)
3
face the music(expression, idiom, get, dispute, provoke)
3
follow(verb, get, catch, observe, have)
3
frisk(verb, study, check, consider, correct)
3
grill(verb, check, examine, challenge, demand)
3
note(verb, study, determine, correct, follow)
3
peer(verb, seize, search, bug, hunt)
3
plumb
3
poke into(verb, expression, check, examine, look)
3
poll(verb, question)
3
pore over(verb, expression, study, check, separate)
3
pump(verb, check, examine, challenge, demand)
3
pursue(verb, study, consider, follow, examine)
3
quest(verb, check, follow, examine, challenge)
3
rummage(verb, action, check, sound, examine)
3
scour(verb, study, check, sound, examine)
3
size up(verb, expression, study, check, consider)
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APASmart Define. (2016). investigate thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/investigate/thesaurus/synonyms
ChicagoSmart Define. 2016. "investigate thesaurus" https://smartdefine.org/investigate/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, investigate thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/investigate/thesaurus/synonyms>.
MLASmart Define. "investigate thesaurus" 17 February 2016. Web. 27 September 2026. <https://smartdefine.org/investigate/thesaurus/synonyms>