17
soberly(adverb, down, seriously, vigorously, earnestly)
12
sedately(adverb, down, seriously, vigorously, earnestly)
10
heavily
10
seriously(adverb, earnestly, truly, sincerely, grimly)
8
gravely(adverb, down, seriously, vigorously, earnestly)
7
grimly(adverb, seriously)
6
demurely(adverb, seriously)
6
ceremoniously
6
earnestly(adverb, seriously, vigorously, actively, truly)
5
devoutly(adverb, piously)
4
quietly(adverb, calmly)
4
formally
4
grandly
4
slowly
4
somberly(adverb, seriously)
4
ceremonially
3
staidly
3
religiously(adverb, piously)
3
thoughtfully(adverb, down, seriously, vigorously, earnestly)
2
majestically
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APASmart Define. (2015). solemnly thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/solemnly/thesaurus/synonyms
ChicagoSmart Define. 2015. "solemnly thesaurus" https://smartdefine.org/solemnly/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, solemnly thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/solemnly/thesaurus/synonyms>.
MLASmart Define. "solemnly thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/solemnly/thesaurus/synonyms>