97 entries under calm topic. ×

65
lasting(verb, adjective, strong, great)
50
permanent(adjective, strong, secure, tough)
48
firm(adjective, close, strong, sound)
40
sound(adjective, strong, secure, tough)
39
constant(adjective, close, strong, secure)
37
unfluctuating(adjective, strong, secure, strain)
34
durable(adjective, strong, sound, secure)
33
steadfast(adjective, close, strong, complete)
29
abiding(verb, adjective, strong, complete)
27
steady(adjective, close, strong, sound)
24
invariable(adjective, strong, secure, strain)
23
fast(adjective, close, strong, secure)
22
stout(adjective, strong, sound, secure)
22
unalterable(adjective, strong, secure, strain)
20
substantial(adjective, strong, sound, secure)
19
stabile(adjective, strong, secure, strain)
14
immutable(adjective, strong, secure, firm)
10
unwavering(adjective, close, strong, secure)
8
patient(adjective, quiet, cool, gentle)
7
long-suffering(adjective, quiet, cool, gentle)
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APASmart Define. (2016). enduring thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/enduring/thesaurus/synonyms
ChicagoSmart Define. 2016. "enduring thesaurus" https://smartdefine.org/enduring/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, enduring thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/enduring/thesaurus/synonyms>.
MLASmart Define. "enduring thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/enduring/thesaurus/synonyms>