54 entries under investigate topic. ×

1
penetrate(verb, examine, test, survey)
1
pierce(verb, examine, test, survey)
1
prod(verb, annoy, provoke, examine, irritate)
1
put out a feeler(verb, expression, idiom, examine, test)
1
put the screws to(verb, expression, idiom, check, examine)
1
sound(verb, examine, test, survey)
1
test the waters(verb, expression, idiom, examine, doubt)
0
check out(expression, dig, penetrate, research)
0
feel out(expression, dig, explore, research)
0
go into(expression, dig, penetrate, research)
0
look-see(dig, penetrate, explore, research)
0
poke(dig, penetrate, explore, research)
0
prospect(dig, explore, research, delve)
0
sift(dig, explore, research, delve)
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APASmart Define. (2016). quiz thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/quiz/thesaurus/synonyms
ChicagoSmart Define. 2016. "quiz thesaurus" https://smartdefine.org/quiz/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, quiz thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/quiz/thesaurus/synonyms>.
MLASmart Define. "quiz thesaurus" 17 February 2016. Web. 1 October 2026. <https://smartdefine.org/quiz/thesaurus/synonyms>