Synonyms|243Antonyms|38|Broader|1Narrower|0Related|60

36 entries under permanent topic. ×

8
fixed(adjective, firm, true, constant, steadfast)
7
enduring(adjective, great, extraordinary, outstanding, notable)
7
undying(adjective, stability, long-term, lifelong)
4
constant(adjective, firm, true, fixed, steadfast)
4
inexpungible(adjective, long-term, lifelong, indestructible)
3
forever(adverb, long-term, lifelong)
3
irrevocable(adjective, fixed, stability, unchangeable)
1
abiding(long-term, lifelong)
1
continual(long-term, lifelong)
1
continuing(long-term, lifelong)
1
deep-rooted(adjective, fixed, long-term, lifelong)
1
durable(adjective, firm, true, fixed, constant)
1
endless(adjective, long-term, lifelong)
1
eternal(adjective, long-term, lifelong)
1
everlasting(adjective, long-term, lifelong)
1
in for the long haul(expression, idiom, long-term, lifelong)
1
incessant(long-term, lifelong)
1
indissoluble(stability, long-term, lifelong)
1
inexhaustible(long-term, lifelong)
1
lifelong
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ChicagoSmart Define. 2016. "indelible thesaurus" https://smartdefine.org/indelible/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, indelible thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/indelible/thesaurus/synonyms>.
MLASmart Define. "indelible thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/indelible/thesaurus/synonyms>