| true(adjective, direct, smooth, right, flat) | |
| completely | |
| delve(verb, probe) | |
| entirely | |
| level(check, mark, determine, direct, smooth) | |
| normal(adjective, even, rigid, inflexible, reliable) | |
| plumb line(noun, expression, idiom, lead, verticality) | |
| precisely(adverb, just, exactly, directly, quite) | |
| square(adverb, check, mark, determine, direct) | |
| bolt(closure, verticality) | |
| directly(adverb, right, exactly, precisely, correctly) | |
| just(adverb, absolutely, completely, exactly, directly) | |
| quite | |
| regular(adjective, direct, smooth, right, flat) | |
| sinker(noun, stone, rock) | |
| smack(adverb, just, absolutely, exactly, directly) | |
| take soundings(verb, expression, idiom, probe, depth) | |
| unravel(verb, grasp, understand, divine, comprehend) | |
| utterly | |
| very |
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| APA | Smart Define. (2015). plumb thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/plumb/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "plumb thesaurus" https://smartdefine.org/plumb/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, plumb thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/plumb/thesaurus/synonyms>. |
| MLA | Smart Define. "plumb thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/plumb/thesaurus/synonyms> |