Synonyms of the word 
UNEXCHANGEABLE → INCOMMUTABLE - INCONVERTIBLE - IRREDEEMABLE - UNCONVERTIBLE
unexchangeable
- adj. Not exchangeable.
incommutable
- adj. Not commutable.
inconvertible
- adj. Not convertible.
irredeemable
- adj. Not redeemable; not able to be restored, recovered, revoked, or escaped.
- adj. (finance, of debts, currency, etc.) Not able to be cancelled by a payment or converted to another form…
unconvertible
- adj. That cannot be converted.
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