96 entries under sincere topic. ×

12
heated(adjective, strong, moving, keen, difficult)
10
vigorous(adjective, keen, warm, intense, energetic)
9
lively(adjective, strong, keen, warm, intense)
9
serious(adjective, complete, keen, warm, total)
8
deep(adjective, clear, strong, tough, severe)
8
violent(adjective, clear, strong, tough, severe)
8
wholehearted(adjective, strong, keen, warm, total)
7
cordial(adjective, feeling, kind, friendly, warm)
6
tender(adjective, kind, moving, keen, friendly)
6
unfeigned(adjective, complete, keen, warm, total)
5
diligent(adjective, strong, passionate, powerful, deep)
5
industrious(adjective, strong, passionate, vigorous, ardent)
5
responsive(adjective, kind, moving, keen, tender)
5
warmhearted(adjective, keen, passionate, enthusiastic, deep)
4
committed(adjective, complete, keen, warm, total)
4
emphatic(adjective, complete, warm, total, intense)
4
pious(adjective, keen, passionate, enthusiastic, eager)
4
religious(adjective, keen, passionate, enthusiastic, eager)
4
stormy(adjective, intense, passionate, enthusiastic, lively)
3
affable(adjective, kind, tender, sympathetic, deep)
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APASmart Define. (2015). fervent thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/fervent/thesaurus/synonyms
ChicagoSmart Define. 2015. "fervent thesaurus" https://smartdefine.org/fervent/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, fervent thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/fervent/thesaurus/synonyms>.
MLASmart Define. "fervent thesaurus" 3 August 2015. Web. 28 September 2026. <https://smartdefine.org/fervent/thesaurus/synonyms>