commutation vs weaning

commutation and weaning both are nouns.

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

As nouns, weaning is a hyponym of commutation; that is, weaning is a word with a more specific, narrower meaning than commutation:

commutation: the act of putting one thing or person in the place of another:
weaning: the act of substituting other food for the mother's milk in the diet of a child or young mammal

Other hyponyms of commutation include replacement, replacing, subrogation, ablactation.

commutation (noun)	weaning (noun)
the travel of a commuter	the act of substituting other food for the mother's milk in the diet of a child or young mammal
(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