copartnership - a partnership in which employees get a share of the profits in addition to their wages

business, business concern, business organisation, business organization, concern - a commercial or industrial enterprise and the people who constitute it; "he bought his brother's business"; "a small mom-and-pop business"; "a racially integrated business concern"

partner - a person who is a member of a partnership

contract - a binding agreement between two or more persons that is enforceable by law