Synonyms|257Antonyms|80|Broader|2Narrower|0Related|279
1
immortalize
1
immortally
1
immortals
1
immutable
1
impregnable
1
in for the long haul(expression, enduring, lasting, permanent, perpetual)
1
incalculable(constant, abundant, unrestrained, endless, immense)
1
inconvertible
1
indeciduous
1
indefeasible
1
indeterminate(constant, abundant, unrestrained, endless, immense)
1
ineffaceable
1
inexhaustible(permanent, long-term, lifelong)
1
inexpugnable
1
inexpungible(permanent, long-term, lifelong)
1
insusceptible
1
invariable(adjective, continuous)
1
inveterate
1
invincible
1
invulnerable
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APASmart Define. (2016). undying thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/undying/thesaurus/synonyms
ChicagoSmart Define. 2016. "undying thesaurus" https://smartdefine.org/undying/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, undying thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/undying/thesaurus/synonyms>.
MLASmart Define. "undying thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/undying/thesaurus/synonyms>