- Definitions|2
- Thesaurus|855
- Abbreviations|0
19 entries under hardened topic. ×
| chronic(adjective, persistent, enduring, lasting) | |
| lifelong(adjective, familiar, established, enduring) | |
| inveterate(adjective, familiar, established, enduring) | |
| old(adjective, continue, familiar, established) | |
| long-standing(adjective, continue, persistent, continuous) | |
| habitual(adjective, persistent, continuous, lasting) | |
| persisting(persistent, continuous, lasting, permanent) | |
| confirmed(persistent, continuous, lasting, continuing) | |
| deep-rooted(persistent, continuous, lasting, permanent) | |
| deep-seated(persistent, continuous, lasting, continuing) | |
| fixed(adjective, stable, persistent, constant) | |
| inbred(persistent, continuous, lasting, continuing) | |
| incurable(persistent, continuous, lasting, continuing) | |
| ineradicable(adjective, persistent, continuous, lasting) | |
| ingrained(persistent, continuous, lasting, continuing) | |
| obstinate(persistent, continuous, lasting, continuing) | |
| set(stable, constant, enduring, lasting) | |
| settled(persistent, continuous, lasting, continuing) | |
| usual(persistent, continuous, lasting, continuing) |
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| APA | Smart Define. (2015). perennial thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/perennial/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "perennial thesaurus" https://smartdefine.org/perennial/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, perennial thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/perennial/thesaurus/synonyms>. |
| MLA | Smart Define. "perennial thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/perennial/thesaurus/synonyms> |