commutability vs substitutability

commutability and substitutability both are nouns.

Word	Noun	Adjective	Verb	Adverb
commutability	Yes	No	No	No
substitutability	Yes	No	No	No

As nouns, commutability and substitutability are synonyms defined as:

commutability and substitutability: exchangeability by virtue of being replaceable

Other synonyms of commutability include replaceability.

commutability (noun)	substitutability (noun)
the quality of being commutable	exchangeability by virtue of being replaceable
exchangeability by virtue of being replaceable