- Definitions|1
- Thesaurus|293
- Abbreviations|0
32 entries under adjective topic. ×
| long | |
| long-standing | |
| old(permanent, recurrent, perpetual, long-term) | |
| perennial(enduring, permanent, recurrent, perpetual) | |
| ancient | |
| antique | |
| lasting(vast, permanent, recurrent, perpetual) | |
| deep-rooted(permanent, innate, inherent, long-term) | |
| deep-seated | |
| elderly | |
| hoary | |
| lifelong(permanent, recurrent, perpetual, long-term) | |
| longer | |
| obsolete | |
| outdated | |
| stable(permanent, long-term, lifelong) | |
| antiquated | |
| bygone | |
| crusted | |
| for life |
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| APA | Smart Define. (2013). longstanding thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/longstanding/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "longstanding thesaurus" https://smartdefine.org/longstanding/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2013, longstanding thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/longstanding/thesaurus/synonyms>. |
| MLA | Smart Define. "longstanding thesaurus" 27 June 2013. Web. 24 September 2026. <https://smartdefine.org/longstanding/thesaurus/synonyms> |