incommutable
irredeemable
changeless
constant
immutable
indefeasible
inert
inexchangeable
insusceptible of change
intransmutable
invariable
irretrievable
irreversible
irrevocable
lasting
noble
nonreturnable
nonreversible
permanent
reverseless
unalterable
unalterative
unaltered
unchangeable
unchanged
unchanging
undeflectable
undeviating
unmodifiable
unpayable
unremitting
unrestorable
unreturnable
unsusceptible
unvariable
unvarying
13-page
accessorio
bimetallic
blue-and-green
depreciate
destructible
government-issued
higher-yielding
ingenerable
istantaneo
one-world
predistribution
ramenta
undestroyed
unmanifest
venustate