79 entries under adjective topic. ×

15
important(substantial, serious, valuable)
13
royal
10
significant(important, substantial, unimportant, serious)
10
major(dull, big, substantial, serious)
10
substantial
9
consequential(small, substantial, serious)
9
essential(substantial, serious)
8
weighty(light, important, substantial, serious)
8
momentous(important, ordinary, insignificant)
7
serious(substantial, weighty, crucial)
6
appreciable
6
crucial(important, critical)
6
eventful(significant, busy)
6
fundamental(important, basic)
6
great
5
awesome(good, bad)
5
meaningful(substantial, serious, little, meaningless)
5
considerable
5
organic(unimportant, inorganic)
4
lit
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APASmart Define. (2015). trivial thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/trivial/thesaurus/antonyms
ChicagoSmart Define. 2015. "trivial thesaurus" https://smartdefine.org/trivial/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2015, trivial thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/trivial/thesaurus/antonyms>.
MLASmart Define. "trivial thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/trivial/thesaurus/antonyms>