111 entries under investigate topic. ×

1
assay(verb, study, check, examine, try)
1
assess(verb, check, examine, try, confirm)
1
audit(noun, verb, study, check, observe)
1
be on the lookout(verb, examine, look, seek, search)
1
check out(verb, expression, study, check, consider)
1
clock(verb, study, check, observe, examine)
1
criticize(verb, charge, check, dispute, examine)
1
delve into(verb, expression, study, check, consider)
1
dig into(verb, expression, check, examine, try)
1
drag(verb, examine, look, seek)
1
eye(verb, study, check, observe, examine)
1
feel out(verb, expression, study, consider, examine)
1
forage(verb, examine, look, seek, search)
1
frisk(verb, study, check, consider, examine)
1
give the once-over(verb, expression, idiom, study, check)
1
give the third degree(verb, expression, idiom, check, examine)
1
kick the tires(verb, expression, idiom, study, check)
1
look over(verb, expression, study, check, consider)
1
notice(verb, study, check, observe, examine)
1
observe(verb, study, check, examine, review)
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APASmart Define. (2016). question thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/question/thesaurus/synonyms
ChicagoSmart Define. 2016. "question thesaurus" https://smartdefine.org/question/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, question thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/question/thesaurus/synonyms>.
MLASmart Define. "question thesaurus" 8 March 2016. Web. 28 September 2026. <https://smartdefine.org/question/thesaurus/synonyms>