7
significant(adjective, importance, valuable, main, notable)
7
significative(adjective, importance, valuable, main, notable)
7
sincere(adjective, set, severe, honest, thoughtful)
7
vital(adjective, importance, valuable, main, notable)
6
austere(adjective, characteristic, quiet, severe, serious)
6
calm(adjective, cool, sensible, restrained, sober)
6
considerable(adjective, importance, main, extremely significant)
6
conventional(adjective, noble, grand, stiff, splendid)
6
disconsolate(adjective, sad, sorrow, depression, depress)
6
dour(adjective, sorrow, depress, sadness, emotion)
6
gargantuan(grand, impressive, overwhelming, imposing)
6
liturgical(adjective, traditional, ritual, ceremonial)
6
mournful(adjective, sad, sorrow, depression, depress)
6
official(adjective, proper, strict, traditional, ritual)
6
pious(adjective, humble, divine, piety, deferential)
6
severe(adjective, calm, quiet, set, hard)
6
unsmiling
5
awe-inspiring(adjective, size, impressive, sacred)
5
bleak(adjective, dull, dark, gloomy, melancholy)
5
composed(adjective, calm, quiet, cool, reasonable)
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APASmart Define. (2016). solemn thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/solemn/thesaurus/synonyms
ChicagoSmart Define. 2016. "solemn thesaurus" https://smartdefine.org/solemn/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, solemn thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/solemn/thesaurus/synonyms>.
MLASmart Define. "solemn thesaurus" 19 February 2016. Web. 25 September 2026. <https://smartdefine.org/solemn/thesaurus/synonyms>