A benefactor; someone who donates to charity or some cause. / A person who backs, supports or champions a cause, activity or institution.

plural of contributor

Of, pertaining to, or involving a contribution / Tending to contribute to a result / (obsolete) Paying tribute, tributary.

In a contributory manner.

(law) The rule of law under which an act or omission of plaintiff is a contributing cause of injury and a possible bar to a complete recovery.

plural of contributorship

The role or status of contributor.

Of or relating to a contributor.