| rooted(verb, adjective, secure, usual, steady) | |
| secure(calm, strong, firm, steady, substantial) | |
| static(secure, fixed, immovable, unchangeable) | |
| tough(adjective, calm, strong, solid, steady) | |
| unaltered | |
| unlimited(adjective, endless, infinite, boundless, incessant) | |
| unvaried | |
| deep-rooted(adjective, calm, strong, solid, steady) | |
| diuturnal(stability, diuturnity) | |
| equable(adjective, calm, strong, secure, firm) | |
| habitual(adjective, usual, steady, stable, regular) | |
| hackneyed | |
| immovable(adjective, secure, firm, true, steady) | |
| indefinite(lasting, everlasting, unending, undying, immutable) | |
| intact | |
| intransient | |
| inviolate | |
| macrobiotic | |
| monumental | |
| undeviating(adjective, stability) |
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| APA | Smart Define. (2016). permanent thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/permanent/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "permanent thesaurus" https://smartdefine.org/permanent/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, permanent thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/permanent/thesaurus/synonyms>. |
| MLA | Smart Define. "permanent thesaurus" 26 February 2016. Web. 20 September 2026. <https://smartdefine.org/permanent/thesaurus/synonyms> |