76 entries under vital topic. ×

7
peppy(adjective, action, strong, tough, informal)
7
powerful(adjective, strong, great, tough, difficult)
6
aggressive(adjective, strong, energetic, lively, active)
6
brisk(adjective, action, strong, tough, intense)
6
zippy(adjective, strong, tough, energetic, powerful)
5
enterprising(adjective, activity, strong, tough, smart)
5
mettlesome(adjective, strong, tough, intense, energetic)
5
red-blooded(adjective, strong, tough, intense, energetic)
4
hearty(adjective, strong, tough, intense, energetic)
4
robust(adjective, strong, tough, intense, energetic)
4
serious(adjective, hard, severe, rough, difficult)
3
vehement(adjective, difficult, intense, energetic, lively)
2
athletic(adjective, strong, tough, intense, energetic)
2
exuberant(adjective, strong, tough, intense, energetic)
2
forcible(adjective, strong, tough, energetic, powerful)
2
potent(adjective, strong, tough, energetic, powerful)
2
snappy(adjective, strong, tough, energetic, powerful)
2
spanking(adjective, strong, tough, energetic, powerful)
2
sturdy(adjective, strong, tough, intense, energetic)
1
activating(adjective, energetic, lively, active, vigorous)
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APASmart Define. (2016). strenuous thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/strenuous/thesaurus/synonyms
ChicagoSmart Define. 2016. "strenuous thesaurus" https://smartdefine.org/strenuous/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, strenuous thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/strenuous/thesaurus/synonyms>.
MLASmart Define. "strenuous thesaurus" 1 April 2016. Web. 28 September 2026. <https://smartdefine.org/strenuous/thesaurus/synonyms>