| innocuous(inferior, inadequate, limited, feeble, useless) | |
| insignificance(adjective, unsubstantial) | |
| insipid | |
| intangible(adjective, unsubstantial) | |
| irrelevant(adjective, slight, lower, value, inferior) | |
| lacking | |
| lame(inferior, inadequate, limited, feeble, useless) | |
| limited(inferior, inadequate, feeble, useless, vain) | |
| little(adjective, slight, lower, value, inferior) | |
| low-ranking(adjective, slight, lower, value, inferior) | |
| meaninglessness(noun, nonexistence) | |
| minor(adjective, slight, lower, value, inferior) | |
| minus | |
| minute(adjective, slight, lower, value, inferior) | |
| missing | |
| negated(adjective, meaningless, invalid, unsubstantiated, unsupported) | |
| negligible(adjective, slight, lower, value, inferior) | |
| neutralized(inferior, inadequate, limited, feeble, useless) | |
| nihility(noun, nonexistence) | |
| nixie |
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| APA | Smart Define. (2015). null thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/null/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "null thesaurus" https://smartdefine.org/null/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, null thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/null/thesaurus/synonyms>. |
| MLA | Smart Define. "null thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/null/thesaurus/synonyms> |