commutable vs substitutable

commutable and substitutable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
commutable	No	Yes	No	No
substitutable	No	Yes	No	No

As adjectives, commutable and substitutable are synonyms defined as:

commutable and substitutable: capable of being exchanged for another or for something else that is equivalent

commutable (adjective)	substitutable (adjective)
subject to alteration or change	capable of being exchanged for another or for something else that is equivalent
capable of being exchanged for another or for something else that is equivalent	(of words) interchangeable in a given context without changing the import of the expression