180 entries under serious topic. ×

42
eager(adjective, activity, person, feeling, strong)
41
sincere(noun, adjective, feeling, open, pleasant)
32
grave(adjective, calm, dull, quiet, cool)
32
solemn(adjective, calm, dull, quiet, cool)
22
intense(adjective, strong, severe, keen, warm)
21
sober(adjective, calm, dull, quiet, cool)
19
heartfelt(adjective, strong, open, pleasant, keen)
18
sedate(adjective, calm, dull, quiet, cool)
17
purposeful(adjective, strong, firm, energetic, importance)
16
weighty(adjective, dull, severe, honest, harsh)
15
devout(adjective, open, keen, warm, honest)
14
resolute(adjective, activity, close, set, severe)
13
determined(adjective, set, severe, total, sensible)
13
diligent(adjective, strong, enthusiastic, powerful, deep)
13
genuine(adjective, person, open, severe, warm)
13
staid(adjective, calm, dull, quiet, set)
12
industrious(adjective, strong, energetic, enthusiastic, determined)
11
faithful(adjective, open, kind, friendly, warm)
11
intent(adjective, strong, severe, keen, warm)
11
steady(adjective, calm, quiet, set, cool)
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APASmart Define. (2016). earnest thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/earnest/thesaurus/synonyms
ChicagoSmart Define. 2016. "earnest thesaurus" https://smartdefine.org/earnest/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, earnest thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/earnest/thesaurus/synonyms>.
MLASmart Define. "earnest thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/earnest/thesaurus/synonyms>