Synonyms|34Antonyms|1|Broader|0Narrower|0Related|2
2
inert
1
changeless
1
immutable
1
incommutable
1
inconvertible
1
indefeasible
1
insusceptible of change(expression, idiom)
1
intransmutable
1
invariable
1
irretrievable
1
irreversible
1
irrevocable
1
lasting
1
noble
1
nonreversible
1
permanent
1
reverseless
1
unalterable
1
unalterative
1
unaltered
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APASmart Define. (2015). nonreturnable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/nonreturnable/thesaurus/synonyms
ChicagoSmart Define. 2015. "nonreturnable thesaurus" https://smartdefine.org/nonreturnable/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, nonreturnable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/nonreturnable/thesaurus/synonyms>.
MLASmart Define. "nonreturnable thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/nonreturnable/thesaurus/synonyms>