| honest truth(noun, expression, certainty, principle, fact) | |
| how things are(noun, expression, idiom, matter, truth) | |
| impregnability | |
| indubitableness(noun, store, trust, confidence, assurance) | |
| inevitability(noun, store, trust, confidence, assurance) | |
| infallibility(noun, certainty, principle, fact, reality) | |
| inside track(noun, expression, certainty, principle, fact) | |
| intensity(noun, power, strength, energy, vigor) | |
| interest(noun, end, reason, use, advantage) | |
| intricateness | |
| invincibility | |
| jurisdiction | |
| justiciability | |
| justifiableness | |
| kindness | |
| legal form | |
| legal process | |
| legalism | |
| like it is(noun, expression, idiom, matter, truth) | |
| likelihood(noun, color, chance, integrity, reliability) |
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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> |