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cofounder

or co-founder

[koh-foun-der] /koʊˈfaʊn dər/
noun
1.
a person who founds or establishes something with another.
Origin of cofounder
1595-1605
1595-1605; co- + founder1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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15
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