unalterable vs incommutable

unalterable and incommutable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unalterable	No	Yes	No	No
incommutable	No	Yes	No	No

unalterable (adjective)	incommutable (adjective)
not capable of being changed or altered	not subject to alteration or change
of a sentence; that cannot be changed	not interchangeable or able to substitute one for another
remaining the same for indefinitely long times