136 entries under strong topic. ×

70
persistent(adjective, quiet, tough, continue)
65
lasting(verb, adjective, calm, great)
51
stable(adjective, sound, tough, strain)
50
permanent(adjective, calm, secure, tough)
48
firm(adjective, calm, close, sound)
40
sound(adjective, calm, secure, tough)
39
constant(adjective, calm, close, secure)
38
consistent(adjective, strain, flat, firm)
37
unfluctuating(adjective, calm, secure, strain)
34
durable(adjective, calm, sound, secure)
33
steadfast(adjective, calm, close, complete)
29
abiding(verb, adjective, calm, complete)
27
steady(adjective, calm, close, sound)
24
invariable(adjective, calm, secure, strain)
23
fast(adjective, calm, close, secure)
22
settled(adjective, strain, flat, firm)
22
stout(adjective, calm, sound, secure)
22
unalterable(adjective, calm, secure, strain)
21
unyielding(adjective, sound, tough, strain)
20
substantial(adjective, calm, sound, secure)
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APASmart Define. (2016). enduring thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/enduring/thesaurus/synonyms
ChicagoSmart Define. 2016. "enduring thesaurus" https://smartdefine.org/enduring/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, enduring thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/enduring/thesaurus/synonyms>.
MLASmart Define. "enduring thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/enduring/thesaurus/synonyms>