1
monumental(adjective, impressive, overwhelming)
1
much
1
multifaceted
1
necessary(adjective, substantial, unimportant, serious)
1
notable(obscure, poor, insignificant)
1
obvious
1
of import
1
once in a lifetime
1
onerous(adjective, difficult)
1
original
1
perceptible
1
pertinent(adjective, substantial, serious)
1
potent
1
predominant(adjective, important, ruling)
1
pregnant(adjective, significant, insignificant, meaningful)
1
proud(adjective, feature, common, ordinary, unimpressive)
1
severe
1
sizable
1
solid
1
sound
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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>