Synonyms|92Antonyms|114|Broader|0Narrower|0Related|223
12
serious(adjective, severe, grim, somber, humorless)
9
grave(adjective, gloomy)
9
sober
8
grim
7
earnest
7
sedate
7
severe(adjective, stern, uncompromising)
7
solemn
7
staid
5
humorless
4
sobersided(adjective, serious)
4
sombre
3
dark
3
dour
3
humourless
3
joyless
3
mirthless
3
po-faced
3
somber
3
straight
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APASmart Define. (2015). unsmiling thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/unsmiling/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsmiling thesaurus" https://smartdefine.org/unsmiling/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, unsmiling thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/unsmiling/thesaurus/synonyms>.
MLASmart Define. "unsmiling thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/unsmiling/thesaurus/synonyms>