Synonyms|341Antonyms|65|Broader|5Narrower|0Related|216

35 entries under permanent topic. ×

1
lifelong
1
long-term
1
longstanding(long-term, lifelong)
1
old(long-term, lifelong)
1
perdurable(absolute, endless, immense, unlimited)
1
perennial(long-term, lifelong)
1
persisting(long-term, lifelong)
1
stable(long-term, lifelong)
1
till the cows come home(expression, idiom, long-term, lifelong)
1
unceasing(adjective, strong, firm, determined, steady)
1
undying(long-term, lifelong)
0
fixed(unfaltering, tireless, untiring, long-term)
0
long-lasting(long-term, lifelong)
0
ongoing(long-term, lifelong)
0
unchanging(certain, reliable, trustworthy, long-term)
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ChicagoSmart Define. 2015. "inexhaustible thesaurus" https://smartdefine.org/inexhaustible/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, inexhaustible thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/inexhaustible/thesaurus/synonyms>.
MLASmart Define. "inexhaustible thesaurus" 13 April 2015. Web. 1 October 2026. <https://smartdefine.org/inexhaustible/thesaurus/synonyms>