9 entries under sober topic. ×

8
earnest(noun, expression, adjective, cool, cold)
6
thoughtful(adjective, happy, careless, superficial)
4
unimpassioned(adjective, upset, light, happy)
1
sincere(adjective, false, disciplined, insincere)
1
hardboiled(adjective, upset, light, disciplined)
1
somber(adjective, light, bright, disciplined)
1
unexcited(adjective, light, happy, disciplined)
-3
matter of fact(expression, adjective, idiom, unimportant)
-4
feller(adjective, friendly, disciplined, well-ordered)
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APASmart Define. (2015). unserious thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/unserious/thesaurus/antonyms
ChicagoSmart Define. 2015. "unserious thesaurus" https://smartdefine.org/unserious/thesaurus/antonyms (accessed September 30, 2026).
HarvardSmart Define 2015, unserious thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/unserious/thesaurus/antonyms>.
MLASmart Define. "unserious thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/unserious/thesaurus/antonyms>