8 entries under seriously topic. ×

9
grimly
8
gravely(adverb, sadly, grimly, sternly)
8
solemnly(adverb, grimly, sternly)
7
soberly(adverb, grimly, sternly)
3
earnestly
2
demurely
1
intensely
1
sedately
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APASmart Define. (2015). somberly thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/somberly/thesaurus/synonyms
ChicagoSmart Define. 2015. "somberly thesaurus" https://smartdefine.org/somberly/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, somberly thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/somberly/thesaurus/synonyms>.
MLASmart Define. "somberly thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/somberly/thesaurus/synonyms>