137 entries under investigate topic. ×

7
ferret out(verb, expression, phrasal verb, action, follow)
7
interrogate(verb, examine, challenge, request, question)
7
ransack(verb, action, check, turn, follow)
6
be after(verb, expression, idiom, plan, encourage)
6
cast about(verb, expression, phrasal verb, check, follow)
6
delve(verb, action, follow, examine, question)
6
look up(verb, expression, phrasal verb, study, search)
6
question(verb, promote, examine, exact, try)
6
sift(verb, move, action, act, movement)
5
go after(verb, expression, phrasal verb, work, attack)
5
rummage(verb, action, check, sound, examine)
5
enquire(verb, examine, challenge, search, test)
5
pry(verb, check, determine, sound, follow)
5
run after(verb, expression, phrasal verb, drive, praise)
4
comb(verb, check, sound, follow, examine)
4
dig(verb, action, work, determine, strain)
4
fish(verb, follow, kill, pursue, look)
4
forage(verb, check, examine, look, search)
4
mouse(verb, follow, pursue, look)
4
nose(verb, follow, informal, pursue, look)
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APASmart Define. (2016). seek thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/seek/thesaurus/synonyms
ChicagoSmart Define. 2016. "seek thesaurus" https://smartdefine.org/seek/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, seek thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/seek/thesaurus/synonyms>.
MLASmart Define. "seek thesaurus" 1 April 2016. Web. 30 September 2026. <https://smartdefine.org/seek/thesaurus/synonyms>