628 entries under strenuous topic. ×

4
empirical(adjective, strength, stable)
4
endurable(adjective, strength, stable)
4
establishable(adjective, strength, stable)
4
evincible(adjective, strength, stable)
4
fair(adjective, strength, stable)
4
flat(adjective, feature, act, strength, doing)
4
flush(adjective, feature, act, strength, doing)
4
forever(adjective, strength, stable)
4
fortified(adjective, power, intense)
4
gargantuan(noun, adjective, adverb, power, intense)
4
hard(adjective, power, intense)
4
incessant(adjective, strength, stable)
4
industrial-strength(adjective, power, intense)
4
ironlike(adjective, power, intense)
4
justifiable(adjective, strength, stable)
4
knock-down(adjective, power, intense)
4
knockout(adjective, power, intense)
4
lasting(adjective, strength, stable)
4
livable(adjective, strength, stable)
4
long(verb, adjective, feature, force, strength)
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APASmart Define. (2016). strong thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/strong/thesaurus/related
ChicagoSmart Define. 2016. "strong thesaurus" https://smartdefine.org/strong/thesaurus/related (accessed September 29, 2026).
HarvardSmart Define 2016, strong thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/strong/thesaurus/related>.
MLASmart Define. "strong thesaurus" 1 April 2016. Web. 29 September 2026. <https://smartdefine.org/strong/thesaurus/related>