80 entries under investigate topic. ×

1
canvass(verb, settle, resolve, view, examine)
1
catechize(ask, dig, explore, research)
1
deliberate(verb, settle, resolve, view, examine)
1
do research(verb, expression, study, view, examine)
1
dredge(action, dig, research, probe)
1
excavate(action, dig, research, probe)
1
experiment(verb, study, check, examine, try)
1
eye(dig, penetrate, explore, research)
1
feel around(expression, dig, penetrate, research)
1
figure(verb, consider, determine, settle, resolve)
1
give the eagle eye(verb, expression, idiom, view, examine)
1
keep tabs(verb, expression, view, examine)
1
leave no stone unturned(verb, expression, idiom, action, sound)
1
penetrate(dig, explore, research, poke)
1
pierce(dig, penetrate, explore, research)
1
prod(dig, penetrate, explore, research)
1
put out a feeler(expression, idiom, dig, penetrate)
1
query(demand, search, ask, dig)
1
quiz(verb, check, examine, try, confirm)
1
ransack(verb, action, turn, dig)
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APASmart Define. (2015). look into thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/look_into/thesaurus/synonyms
ChicagoSmart Define. 2015. "look into thesaurus" https://smartdefine.org/look_into/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, look into thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/look_into/thesaurus/synonyms>.
MLASmart Define. "look into thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/look_into/thesaurus/synonyms>