See contributor in Webster's New World Roget's A-Z Thesaurus II
noun
A person who gives to a charity or cause:
benefactor, benefactress, donator, donor, giver. See giveA person who supports or champions an activity, cause, or institution, for example:
backer, benefactor, friend, patron, sponsor, supporter. (Informal) angel. See helpA person instrumental in the growth of something, especially in its early stages:
builder, creator, developer, pioneer. See make
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