96 entries under sincere topic. ×

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adherent(adjective, passionate, ardent, spiritual)
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authentic(adjective, complete, warm, total, passionate)
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bona fide(expression, adjective, complete, warm, total)
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candid(adjective, complete, warm, total, passionate)
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cheerful(adjective, kind, tender, sympathetic, deep)
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compassionate(adjective, kind, tender, sympathetic, deep)
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effusive(adjective, enthusiastic, lively, hot, deep)
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empathetic(adjective, deep, earnest, wholehearted)
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frank(adjective, complete, warm, total, passionate)
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godly(adjective, passionate, ardent, spiritual)
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goody-goody(adjective, passionate, ardent, spiritual)
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goody two-shoes(expression, adjective, passionate, ardent)
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gracious(adjective, kind, tender, sympathetic, deep)
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heart-and-soul(adjective, passionate, ardent, spiritual)
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holy(adjective, passionate, ardent, spiritual)
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hospitable(adjective, deep, earnest, wholehearted)
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kindhearted(adjective, kind, tender, sympathetic, deep)
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kindly(adjective, kind, tender, sympathetic, deep)
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never-failing(adjective, complete, warm, total, passionate)
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orthodox(adjective, passionate, ardent, spiritual)
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APASmart Define. (2015). fervent thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/fervent/thesaurus/synonyms
ChicagoSmart Define. 2015. "fervent thesaurus" https://smartdefine.org/fervent/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, fervent thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/fervent/thesaurus/synonyms>.
MLASmart Define. "fervent thesaurus" 3 August 2015. Web. 29 September 2026. <https://smartdefine.org/fervent/thesaurus/synonyms>