575 entries under adjective topic. ×

19
essential(physical, importance, material, big)
19
invariable(strain, firmness, labour, hardiness)
19
physical(body, hard, solid, material)
19
real(solid, physical, material, enthusiastic)
19
resilient(strain, firmness, labour, hardiness)
19
resistant(strain, firmness, labour, hardiness)
19
serious(importance, big, heavy, important)
19
sizeable(significant, large)
19
stabile(calm, strong, secure, strain)
19
stationary(strain, firmness, labour, hardiness)
19
tenable(strain, firmness, labour, hardiness)
19
tight(close, strong, hard, strain)
19
unalterable(strain, firmness, labour, hardiness)
19
unyielding(strong, hard, sound, tough)
19
well-balanced(strain, firmness, labour, hardiness)
18
long-standing(strain, firmness, labour, hardiness)
18
momentous(strong, importance, big, heavy)
18
rigid(strain, firmness, labour, hardiness)
18
substantive(material, certain, real, genuine)
17
generous(good, give, great, fair)
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APASmart Define. (2016). substantial thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/substantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "substantial thesaurus" https://smartdefine.org/substantial/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, substantial thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/substantial/thesaurus/synonyms>.
MLASmart Define. "substantial thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/substantial/thesaurus/synonyms>