Synonyms|936Antonyms|350|Broader|17Narrower|2Related|1.6k
2
weighty
2
crucial
2
distinguished
1
apropos
1
arrant
1
eminent
1
essential
1
eventful
1
fatal
1
fateful
1
fundamental
1
gargantuan
1
great
1
grim
1
key
1
major
1
meaningful
1
meditative
1
melancholy
1
momentous
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APASmart Define. (2015). frivolous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/frivolous/thesaurus/antonyms
ChicagoSmart Define. 2015. "frivolous thesaurus" https://smartdefine.org/frivolous/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2015, frivolous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/frivolous/thesaurus/antonyms>.
MLASmart Define. "frivolous thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/frivolous/thesaurus/antonyms>