754 entries under adjective topic. ×

19
robust(strong, hard, tough, strain)
19
stabile(strain, firmness, labour, hardiness)
19
staying(strain, firmness, labour, hardiness)
19
stout(strain, firmness, labour, hardiness)
19
sustained(strain, firmness, labour, hardiness)
18
defensive(strain, firmness, labour, hardiness)
18
immune(strain, firmness, labour, hardiness)
18
impregnable(strain, firmness, labour, hardiness)
18
resilient(strong, strain, stiff, firmness)
18
resist(strain, firmness, labour, hardiness)
18
stringent(hard, tough, severe, rough)
18
substantial(strain, firmness, labour, hardiness)
18
well-balanced(strain, firmness, even, labour)
18
withstanding(strong, strain, stiff, firmness)
17
hidebound(moderate, severe, determined, resolute)
17
inelastic(hard, tough, severe, firm)
16
set in stone(expression, idiom, mean, hard)
15
exact(correct, severe, solid, proper)
15
iron(mean, strong, hard, tough)
15
precise(hard, correct, severe, rough)
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APASmart Define. (2015). rigid thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/rigid/thesaurus/synonyms
ChicagoSmart Define. 2015. "rigid thesaurus" https://smartdefine.org/rigid/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, rigid thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/rigid/thesaurus/synonyms>.
MLASmart Define. "rigid thesaurus" 3 August 2015. Web. 24 September 2026. <https://smartdefine.org/rigid/thesaurus/synonyms>