143 entries under keen topic. ×

6
fierce(adjective, clear, strong, tough, severe)
6
impatient(adjective, strong, desire, intense)
6
tender(adjective, kind, moving, friendly)
6
unfeigned(adjective, complete, warm, total)
5
red-hot(adjective, feeling, warm, intense)
5
afire(adjective, passionate, enthusiastic, excited)
5
faithful(adjective, kind, friendly, warm)
5
fanatic(noun, adjective, passionate, enthusiastic)
5
resolute(adjective, clear, tough, severe)
5
responsive(adjective, kind, moving, tender)
5
warmhearted(adjective, passionate, enthusiastic, deep)
4
committed(adjective, complete, warm, total)
4
exhilarated(adjective, warm, passionate, enthusiastic)
4
gung ho(expression, adjective, strong, concern)
4
intent(adjective, strong, warm, intense)
4
pious(adjective, passionate, enthusiastic, eager)
4
religious(adjective, passionate, enthusiastic, eager)
4
true(adjective, complete, warm, total)
4
wild(adjective, strong, difficult, intense)
3
agog(adjective, strong, desire, warm)
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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>