64 entries under investigate topic. ×

8
unearth(verb, action, cover, meet, determine)
7
hunt(verb, cover, follow, catch, discover)
7
seek(verb, action, follow, examine, discover)
6
chase(verb, cover, follow, catch, discover)
6
quest(verb, follow, examine, discover, pursue)
5
follow(verb, cover, catch, discover, pursue)
5
probe(verb, action, examine, discover, find)
5
pursue(verb, cover, follow, catch, discover)
5
search out(verb, expression, phrasal verb, establish, follow)
5
track down(verb, expression, phrasal verb, meet, beat)
4
sniff out(verb, expression, phrasal verb, cover, do)
3
cast about(verb, expression, follow, examine, pursue)
3
scout(verb, cover, do, follow, catch)
2
beat the bushes(expression, idiom, cover, do, follow)
2
delve(verb, action, follow, examine, pursue)
2
excavate(action, dig, research, probe)
2
go after(verb, expression, cover, follow, catch)
2
inquire(verb, action, follow, examine, pursue)
2
leave no stone unturned(verb, expression, idiom, action, follow)
2
look high and low(verb, expression, idiom, follow, examine)
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APASmart Define. (2015). ferret out thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/ferret_out/thesaurus/synonyms
ChicagoSmart Define. 2015. "ferret out thesaurus" https://smartdefine.org/ferret_out/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, ferret out thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/ferret_out/thesaurus/synonyms>.
MLASmart Define. "ferret out thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/ferret_out/thesaurus/synonyms>