15
famous(adjective, bad, weak, unknown)
12
substantial(adjective, important, significant, ample)
11
important(adjective, outstanding, significant, substantial, valuable)
11
significant(adjective, substantial, meaningful, telling)
9
royal
7
big(adjective, significant, substantial)
7
titanic
7
consequential(adjective, small, significant, substantial)
7
distinguished(adjective, obscure)
7
gargantuan
6
gorgeous(adjective, dull, bad, unattractive)
5
meaningful(adjective, significant, substantial, little, meaningless)
5
major(adjective, important, inferior, significant, substantial)
5
overarching
5
valuable(adjective, significant, substantial)
4
momentous(adjective, important, ordinary)
4
appreciable
4
awesome
4
boujee
4
decisive
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APASmart Define. (2016). insignificant thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/insignificant/thesaurus/antonyms
ChicagoSmart Define. 2016. "insignificant thesaurus" https://smartdefine.org/insignificant/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, insignificant thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/insignificant/thesaurus/antonyms>.
MLASmart Define. "insignificant thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/insignificant/thesaurus/antonyms>