'Commutability' definitions:

Definition of 'commutability'

From: WordNet
noun
Exchangeability by virtue of being replaceable [syn: replaceability, substitutability, commutability]
noun
The quality of being commutable [syn: commutability, transmutability]

Definition of 'Commutability'

From: GCIDE
  • Commutability \Com*mu`ta*bil"i*ty\, n. The quality of being commutable. [1913 Webster]