"partnership" in the noun sense
the members of a business venture created by contract
a cooperative relationship between people or groups who agree to share responsibility for achieving some specific goal
"effective language learning is a partnership between school, teacher and student"
"the action teams worked in partnership with the government"
a contract between two or more persons who agree to pool talent and money and share profits or losses
Source: WordNet® (An amazing lexical database of English)
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