215 entries under adjective topic. ×
| unvarying(calm, strong, secure, firm) | |
| interminable(steady, persistent, constant, continuous) | |
| dateless(steady, constant, continuous, lasting) | |
| incessant(steady, stable, persistent, constant) | |
| infinite(continuous, endless, boundless, everlasting) | |
| perdurable(calm, strong, continue, sturdy) | |
| ageless(fixed, lasting, unchanging, unchangeable) | |
| indelible(firm, true, fixed, constant) | |
| inveterate(impulse, established) | |
| irreversible | |
| irrevocable(fixed, unchangeable) | |
| long-term(vast, lasting, lifelong, diurnal) | |
| never-ending(constant, continuous, endless, infinite) | |
| regular(usual, steady, stable, routine) | |
| sempiternal | |
| uninterrupted(steady, stable, regular, fixed) | |
| unremitting(steady, stable, persistent, constant) | |
| solid(calm, strong, secure, steady) | |
| unfading(fixed, constant, vast, enduring) | |
| unrelenting(persistent, constant, continuous, endless) |
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| APA | Smart Define. (2016). permanent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/permanent/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "permanent thesaurus" https://smartdefine.org/permanent/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, permanent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/permanent/thesaurus/synonyms>. |
| MLA | Smart Define. "permanent thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/permanent/thesaurus/synonyms> |