39
tenable(adjective, strain, firmness, labour, hardiness)
39
enormous(adjective, feature, characteristic, person, body)
39
herculean(adjective, feature, characteristic, force, energy)
39
stationary(adjective, strain, firmness, labour, hardiness)
38
defensive(adjective, strain, firmness, labour, hardiness)
38
constant(adjective, calm, good, tough, strain)
38
long-standing(adjective, strain, firmness, labour, hardiness)
38
rock-solid(adjective, hard, strain, firmness, compact)
38
unalterable(adjective, strain, firmness, labour, hardiness)
38
withstanding(adjective, strain, stiff, firmness, sturdy)
37
immense(adjective, feature, characteristic, person, body)
37
immune(adjective, strain, firmness, safe, unaffected)
37
resist(verb, adjective, strain, firmness, labour)
37
hulking(adjective, feature, characteristic, solid, large)
37
prodigious(adjective, feature, characteristic, person, body)
37
settled(adjective, secure, easy, strain, flat)
36
viable(adjective, strain, firmness, labour, hardiness)
36
endurant(adjective, strain, firmness, labour, hardiness)
36
gigantic(adjective, feature, characteristic, size)
36
stabile(adjective, strain, firmness, labour, hardiness)
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APASmart Define. (2016). strong thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/strong/thesaurus/synonyms
ChicagoSmart Define. 2016. "strong thesaurus" https://smartdefine.org/strong/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, strong thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/strong/thesaurus/synonyms>.
MLASmart Define. "strong thesaurus" 1 April 2016. Web. 21 September 2026. <https://smartdefine.org/strong/thesaurus/synonyms>