83 entries under investigate topic. ×

2
look high and low(verb, expression, idiom, check, follow)
2
nose(verb, follow, pursue, seek)
2
observe(verb, meet, see, catch, strike)
2
probe(verb, check, determine, follow, examine)
2
pry(verb, check, determine, follow, examine)
2
ransack(verb, beat, check, follow, examine)
2
root(verb, check, follow, examine, pursue)
2
run after(verb, expression, phrasal verb, drive, follow)
2
scout(verb, check, bother, follow, catch)
2
scout out(verb, expression, phrasal verb, determine, follow)
2
scratch(verb, bother, follow, annoy, harass)
2
search out(verb, expression, phrasal verb, determine, establish)
2
spot(verb, break, meet, see, establish)
2
turn inside out(verb, expression, idiom, phrasal verb, beat)
2
turn upside down(verb, expression, idiom, phrasal verb, beat)
1
be after(verb, follow, pursue, seek)
1
beat(verb, check, examine, look, seek)
1
beat about(verb, expression, phrasal verb, check, examine)
1
bob for(verb, expression, phrasal verb, follow, pursue)
1
case(examine, seek, search, inspect)
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APASmart Define. (2015). track down thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/track_down/thesaurus/synonyms
ChicagoSmart Define. 2015. "track down thesaurus" https://smartdefine.org/track_down/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, track down thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/track_down/thesaurus/synonyms>.
MLASmart Define. "track down thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/track_down/thesaurus/synonyms>