Supplementary is a related term of contributory.
As adjectives the difference between supplementary and contributory
is that supplementary is additional; added to supply what is wanted while contributory is of, pertaining to, or involving a contribution.
supplementary
English
Adjective
(
en adjective)
Additional; added to supply what is wanted.
Related terms
* presupplementary
References
*
contributory
English
Adjective
(
en adjective)
Of, pertaining to, or involving a contribution
Tending to contribute to a result
Derived terms
* contributory negligence