inconvertible vs incommutable

inconvertible and incommutable both are adjectives.

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

inconvertible (adjective)	incommutable (adjective)
used especially of currencies; incapable of being exchanged for or replaced by another currency of equal value	not subject to alteration or change
not capable of being changed into something else	not interchangeable or able to substitute one for another