122 entries under verb topic. ×

15
fathom(sound, grasp, understand, divine)
15
sound(noun, check, mark, determine)
13
measure(noun, determine, sound, grasp)
10
gauge(noun, check, mark, determine)
10
plummet(noun, drop, fall, lead)
7
penetrate(grasp, understand, divine, comprehend)
7
probe(grasp, understand, divine, comprehend)
6
delve
5
take soundings(expression, idiom, probe, depth)
5
unravel(grasp, understand, divine, comprehend)
4
line(check, mark, determine, fit)
4
survey(check, mark, determine, fit)
3
caliper(check, mark, determine, fit)
3
discern(grasp, understand, divine, comprehend)
3
dive(descend, underwater)
3
divine(grasp, understand, comprehend, discern)
3
dope out(expression, check, mark, determine)
3
go into(expression, phrasal verb)
3
graduate(check, mark, determine, fit)
3
investigate
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APASmart Define. (2015). plumb thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/plumb/thesaurus/synonyms
ChicagoSmart Define. 2015. "plumb thesaurus" https://smartdefine.org/plumb/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, plumb thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/plumb/thesaurus/synonyms>.
MLASmart Define. "plumb thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/plumb/thesaurus/synonyms>