188 entries under vigorous topic. ×

8
ardent(adjective, difficult, intense, energetic, passionate)
8
brisk(adjective, tough, severe, energetic, powerful)
8
dynamic(adjective, great, tough, bright, intense)
8
earnest(adjective, intense, energetic, passionate, violent)
8
spirited(adjective, open, tough, bright, difficult)
8
trenchant(adjective, feeling, great, severe, sharp)
8
warm(adjective, feeling, open, difficult, intense)
7
animated(adjective, open, bright, difficult, intense)
7
concentrated(adjective, set, hard, tough, firm)
7
flourishing(adjective, sound, tough, right, fit)
7
gutsy(adjective, tough, energetic, violent, powerful)
7
mettlesome(adjective, tough, energetic, powerful, lively)
7
peppy(adjective, tough, energetic, powerful, lively)
7
strenuous(adjective, moving, tough, difficult, energetic)
7
vital(adjective, tough, energetic, powerful, lively)
7
vivacious(adjective, intense, energetic, enthusiastic, powerful)
7
zippy(adjective, tough, sharp, energetic, powerful)
6
aggressive(adjective, severe, energetic, violent, lively)
6
ample(adjective, solid, big, important, enthusiastic)
6
enthusiastic(adjective, intense, passionate, violent, powerful)
10 years ago|100k views|share |citing 
APASmart Define. (2016). strong thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/strong/thesaurus/synonyms
ChicagoSmart Define. 2016. "strong thesaurus" https://smartdefine.org/strong/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, strong thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/strong/thesaurus/synonyms>.
MLASmart Define. "strong thesaurus" 1 April 2016. Web. 26 September 2026. <https://smartdefine.org/strong/thesaurus/synonyms>