commutation vs travelling

commutation and travelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
commutation	Yes	No	No	No
travelling	Yes	No	No	No

As nouns, travelling is a hypernym of commutation; that is, travelling is a word with a broader meaning than commutation:

Other hypernyms of commutation include travel, traveling.

commutation (noun)	travelling (noun)
the travel of a commuter	the act of going from one place to another
(law) the reduction in severity of a punishment imposed by law
the act of putting one thing or person in the place of another:
a warrant substituting a lesser punishment for a greater one