different between upholder vs contributor

English

uphold +? -er

upholder (plural upholders)

From Anglo-Norman contributour, itself from Latin con- + tributum + -tor

contributor (plural contributors)

A benefactor; someone who donates to charity or some cause.
I am a longstanding financial contributor to Amnesty International.
A person who backs, supports or champions a cause, activity or institution.
He was a regular contributor to Greenpeace protests.
A person (or thing) instrumental in the creation or growth of something.
With her strength and intelligence, she was an important contributor to the victorious effort.
A person who produces articles published in a newspaper, magazine, online publication, etc.
William Safire has been a notable contributor to the op-ed pages of the New York Times for many years.

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