67 entries under strong topic. ×

6
brisk(adjective, action, tough, intense)
6
kinetic(adjective, action, moving, energetic)
6
zippy(adjective, tough, energetic, powerful)
5
Herculean(adjective, tough, severe, difficult)
5
enterprising(adjective, activity, tough, smart)
5
indefatigable(adjective, moving, difficult, energetic)
5
mettlesome(adjective, tough, intense, energetic)
5
red-blooded(adjective, tough, intense, energetic)
4
hearty(adjective, tough, intense, energetic)
4
mean(adjective, hard, severe, rough)
4
robust(adjective, tough, intense, energetic)
4
sprightly(adjective, action, moving, lively)
2
athletic(adjective, tough, intense, energetic)
2
exuberant(adjective, tough, intense, energetic)
2
forcible(adjective, tough, energetic, powerful)
2
potent(adjective, tough, energetic, powerful)
2
snappy(adjective, tough, energetic, powerful)
2
spanking(adjective, tough, energetic, powerful)
2
sturdy(adjective, tough, intense, energetic)
2
unflagging(adjective, difficult, energetic, lively)
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APASmart Define. (2016). strenuous thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/strenuous/thesaurus/synonyms
ChicagoSmart Define. 2016. "strenuous thesaurus" https://smartdefine.org/strenuous/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, strenuous thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/strenuous/thesaurus/synonyms>.
MLASmart Define. "strenuous thesaurus" 1 April 2016. Web. 25 September 2026. <https://smartdefine.org/strenuous/thesaurus/synonyms>