2
fly in the face of(expression, idiom, get, dispute, provoke)
2
forage(verb, check, examine, look, seek)
2
go over with a fine-tooth comb(verb, expression, idiom, study, check)
2
grub(verb, check, turn, produce, clean)
2
hang in(expression, get, oppose, fight, dispute)
2
hit up(verb, expression, examine, challenge, seek)
2
hold out for(verb, expression, idiom, examine, challenge)
2
hunt for(verb, expression, phrasal verb, check, follow)
2
impeach(verb, get, dispute, provoke, try)
2
impose(verb, get, dispute, provoke, try)
2
impugn(verb, get, dispute, provoke, try)
2
insist upon(verb, expression, get, oppose, fight)
2
interview(verb, examine, challenge, question, seek)
2
invite competition(verb, expression, get, oppose, fight)
2
keep track(verb, follow, observe, record, track)
2
knock(verb, examine, challenge, request, seek)
2
leave no stone unturned(verb, expression, idiom, action, check)
2
look high and low(verb, expression, idiom, check, sound)
2
look see(expression, study, check, consider, correct)
2
make a point of(expression, idiom, get, dispute, provoke)
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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>