Synonyms|689Antonyms|188|Broader|9Narrower|13Related|1.4k

38 entries under secure topic. ×

66
stable(adjective, strong, tough, strain)
61
lasting(adjective, calm, strong, tough)
50
firm(adjective, calm, strong, tough)
48
enduring(adjective, calm, strong, tough)
47
constant(adjective, calm, strong, tough)
38
unfluctuating(adjective, calm, strong, strain)
37
fixed(verb, adjective, strong, tough)
34
invariable(adjective, calm, strong, strain)
34
steadfast(adjective, calm, strong, strain)
33
unalterable(adjective, calm, strong, strain)
28
steady(adjective, calm, strong, strain)
22
immutable(adjective, calm, strong, firm)
20
abiding(adjective, calm, strong, tough)
20
stabile(adjective, calm, strong, strain)
12
immobile(steady, fixed, immovable, static)
8
unvarying(adjective, calm, strong, firm)
5
solid(adjective, calm, strong, steady)
4
rooted(verb, adjective, usual, steady)
4
static(fixed, immovable, unchangeable)
3
equable(adjective, calm, strong, firm)
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APASmart Define. (2016). permanent thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/permanent/thesaurus/synonyms
ChicagoSmart Define. 2016. "permanent thesaurus" https://smartdefine.org/permanent/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, permanent thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/permanent/thesaurus/synonyms>.
MLASmart Define. "permanent thesaurus" 26 February 2016. Web. 20 September 2026. <https://smartdefine.org/permanent/thesaurus/synonyms>