215 entries under adjective topic. ×

30
settled(strain, firmness, labour, hardiness)
28
fast(strain, firmness, labour, hardiness)
28
steady(calm, strong, secure, strain)
25
long-standing(continue, strain, firmness, labour)
22
immutable(calm, strong, secure, firm)
21
staying(strain, firmness, labour, hardiness)
21
unchanging(firm, steady, stable, regular)
20
abiding(calm, strong, secure, tough)
20
impregnable(strain, firmness, labour, hardiness)
20
rigid(strain, firmness, labour, hardiness)
20
stabile(calm, strong, secure, strain)
20
stout(strain, firmness, labour, hardiness)
20
substantial(strain, firmness, labour, hardiness)
20
sustained(strain, firmness, persistent, continuous)
19
changeless(stable, fixed, constant, enduring)
19
quiescent(strain, firmness, labour, hardiness)
19
resistant(strain, firmness, labour, hardiness)
19
tight(strain, firmness, labour, hardiness)
18
unyielding(strain, firmness, labour, hardiness)
17
unchangeable(calm, strong, solid, substantial)
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APASmart Define. (2016). permanent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/permanent/thesaurus/synonyms
ChicagoSmart Define. 2016. "permanent thesaurus" https://smartdefine.org/permanent/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, permanent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/permanent/thesaurus/synonyms>.
MLASmart Define. "permanent thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/permanent/thesaurus/synonyms>