As adjectives the difference between unaltered and unchangeable
is that unaltered is remaining in its initial state while unchangeable is not changeable; incapable of being changed or of changing; immutable.
As a noun unchangeable is
something that cannot be changed.
unaltered
English
Adjective
(-)
Remaining in its initial state
Synonyms
* unchanged
Antonyms
* altered
* changed
Anagrams
*
unchangeable
English
Adjective
(-)
Not changeable; incapable of being changed or of changing; immutable.
Noun
(
en noun)
Something that cannot be changed.
References
*