180 entries under serious topic. ×

2
unflinching(adjective, resolute, persistent, unwavering)
2
unwavering(adjective, complete, warm, firm, total)
1
abnegating(adjective, calm, quiet, reasonable, sensible)
1
aboveboard(open, honest, true, straightforward, straight)
1
abstaining(adjective, calm, quiet, reasonable, sensible)
1
accomplished(adjective, regular, practical, competent)
1
actual(open, honest, true, straightforward, straight)
1
artless(open, honest, true, straightforward, straight)
1
bent(adjective, set, firm, determined, fixed)
1
bent on(expression, adjective, resolute, persistent)
1
brainy(adjective, reasonable, keen, sensible, deep)
1
buckled down(expression, adjective, resolute, persistent)
1
caustic(adjective, close, strong, hard, severe)
1
clear-headed(adjective, calm, quiet, reasonable, sensible)
1
cold(adjective, calm, close, hard, severe)
1
cold sober(expression, adjective, calm, dull, quiet)
1
constrained(adjective, calm, quiet, reasonable, sensible)
1
contemplative(adjective, set, reasonable, severe, keen)
1
dead-level(open, honest, true, straightforward, straight)
1
drab(adjective, calm, dull, quiet, reasonable)
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APASmart Define. (2016). earnest thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/earnest/thesaurus/synonyms
ChicagoSmart Define. 2016. "earnest thesaurus" https://smartdefine.org/earnest/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, earnest thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/earnest/thesaurus/synonyms>.
MLASmart Define. "earnest thesaurus" 24 March 2016. Web. 29 September 2026. <https://smartdefine.org/earnest/thesaurus/synonyms>