105 entries under adjective topic. ×

10
important(dull, weak, outstanding, substantial)
6
significant(important, substantial, critical, meaningful)
5
awesome(good, bad)
5
serious(false, important, dishonest, substantial)
5
big(slight, poor, thin, important)
5
major(important, inferior, little)
5
momentous(important, ordinary, insignificant)
5
powerful
5
substantial(weak, soft, slight, important)
5
organic
5
weighty(light, important, serious)
4
fundamental(important, basic)
4
consequential(important, small, significant, substantial)
4
meaningful(important, substantial, little, meaningless)
4
prominent(important, common)
4
vintage
4
central
4
crucial(important, critical)
4
decisive
4
eminent(obscure, important, unknown)
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APASmart Define. (2016). unimportant thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unimportant/thesaurus/antonyms
ChicagoSmart Define. 2016. "unimportant thesaurus" https://smartdefine.org/unimportant/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2016, unimportant thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unimportant/thesaurus/antonyms>.
MLASmart Define. "unimportant thesaurus" 28 March 2016. Web. 26 September 2026. <https://smartdefine.org/unimportant/thesaurus/antonyms>