95 entries under vigorous topic. ×

11
fanatical(adjective, strong, moving, keen, warm)
10
vigorous(adjective, keen, warm, intense, energetic)
9
ablaze(adjective, intense, passionate, excited)
9
anxious(adjective, strong, kind, keen, friendly)
9
lively(adjective, strong, keen, warm, intense)
9
strong(adjective, difficult, intense, passionate, violent)
8
rabid(adjective, desire, concern, keen, warm)
8
wholehearted(adjective, strong, keen, warm, total)
7
active(adjective, energetic, excited, lively)
7
exuberant(adjective, keen, warm, passionate, excited)
5
red-hot(adjective, feeling, keen, warm, intense)
5
afire(adjective, keen, passionate, enthusiastic, excited)
5
industrious(adjective, strong, passionate, ardent)
4
emphatic(adjective, complete, warm, total, intense)
4
energized(adjective, energetic, excited, lively, active)
4
exhilarated(adjective, keen, warm, passionate, enthusiastic)
4
gung ho(expression, adjective, strong, concern, keen)
4
intent(adjective, strong, keen, warm, intense)
4
powerful(adjective, strong, intense, passionate, violent)
4
strenuous(adjective, difficult, stressful)
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APASmart Define. (2015). fervent thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/fervent/thesaurus/synonyms
ChicagoSmart Define. 2015. "fervent thesaurus" https://smartdefine.org/fervent/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, fervent thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/fervent/thesaurus/synonyms>.
MLASmart Define. "fervent thesaurus" 3 August 2015. Web. 26 September 2026. <https://smartdefine.org/fervent/thesaurus/synonyms>