| constitutionality(right, legality) | |
| correctness(noun, truth, certainty, principle, fact) | |
| duress(noun, power, strength, energy, vigor) | |
| efficiency(power, use, success) | |
| fairness(truth, reliability, accuracy) | |
| firmness(noun, store, trust, confidence, assurance) | |
| forcefulness(noun, force, drive, power, strength) | |
| foundation(noun, strength, substance, genuineness, rationality) | |
| grimness | |
| hardness | |
| hardship | |
| harshness | |
| helpfulness(use, success, efficiency) | |
| inclemency | |
| legitimateness(noun, right, legality) | |
| might(noun, power, strength, energy, vigor) | |
| permissibility(right, legality) | |
| persuasiveness(noun, power, strength, energy, substance) | |
| pizzazz(noun, drive, power) | |
| point(noun, force, drive, power, strength) |
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| APA | Smart Define. (2015). validity thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/validity/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "validity thesaurus" https://smartdefine.org/validity/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, validity thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/validity/thesaurus/synonyms>. |
| MLA | Smart Define. "validity thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/validity/thesaurus/synonyms> |