substitutability vs replaceability

substitutability and replaceability both are nouns.

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

As nouns, substitutability and replaceability are synonyms defined as:

substitutability and replaceability: exchangeability by virtue of being replaceable

Other synonyms of substitutability include commutability.

substitutability (noun)	replaceability (noun)
exchangeability by virtue of being replaceable	exchangeability by virtue of being replaceable