commutability vs fungibility

commutability and fungibility both are nouns.

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

As nouns, fungibility is a hypernym of commutability; that is, fungibility is a word with a broader meaning than commutability:

Other hypernyms of commutability include exchangeability, interchangeability, interchangeableness.

commutability (noun)	fungibility (noun)
the quality of being commutable	the quality of being capable of exchange or interchange
exchangeability by virtue of being replaceable