125 entries under exact topic. ×

6
onerous(adjective, hard, severe, rough, difficult)
6
true(noun, adjective, correct, right, appropriate)
5
methodical(noun, adjective, correct, solid, perfect)
5
undeviating(adjective, severe, harsh, solid)
4
detail oriented(adjective, strict, scrupulous, detailed)
4
faultless(noun, precise, accurate)
4
flawless(adjective, right, perfect, proper)
4
intemperate(adjective, hard, tough, severe, rough)
4
on the button(noun, expression, idiom, correct, right)
4
on the money(noun, expression, idiom, correct, right)
4
strait-laced(adjective, tough, severe, firm, harsh)
3
clear-cut(noun, precise, truth, accurate)
3
dead on(noun, precise, accurate)
3
discriminating(adjective, close, correct, fine, solid)
3
distinct(noun, correct, solid, perfect)
3
express(noun, precise, accurate)
3
on target(noun, precise, accurate)
3
perfect(noun, precise, accurate)
3
right on(noun, precise, accurate)
3
scientific(adjective, close, correct, solid)
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APASmart Define. (2016). rigorous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms
ChicagoSmart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, rigorous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>.
MLASmart Define. "rigorous thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms>