66 entries under dark topic. ×

67
serious(adjective, calm, dull, quiet, cool)
58
grave(adjective, calm, dull, quiet, cool)
34
sober(adjective, calm, dull, quiet, cool)
28
earnest(adjective, calm, dull, quiet, cool)
25
sedate(adjective, calm, dull, quiet, cool)
25
staid(adjective, calm, dull, quiet, set)
19
somber(adjective, calm, dull, quiet, cool)
18
weighty(adjective, dull, quiet, severe, honest)
10
gloomy(adjective, dull, blue, low, sad)
6
severe(adjective, calm, quiet, set, hard)
5
bleak(adjective, dull, gloomy, melancholy)
5
composed(adjective, calm, quiet, cool, reasonable)
5
dull(adjective, quiet, severe, heavy)
5
no-nonsense(adjective, calm, dull, quiet, cool)
4
collected(adjective, calm, quiet, cool, reasonable)
4
serene(adjective, calm, quiet, cool, reasonable)
4
subdued(adjective, calm, dull, quiet, reasonable)
4
unruffled(adjective, calm, quiet, cool, reasonable)
3
depressing(adjective, dull, gloomy, melancholy)
3
drab(adjective, calm, dull, quiet, reasonable)
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APASmart Define. (2016). solemn thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/solemn/thesaurus/synonyms
ChicagoSmart Define. 2016. "solemn thesaurus" https://smartdefine.org/solemn/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, solemn thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/solemn/thesaurus/synonyms>.
MLASmart Define. "solemn thesaurus" 19 February 2016. Web. 24 September 2026. <https://smartdefine.org/solemn/thesaurus/synonyms>