cooperation
kəʊˌɒpəˈreɪʃ(ə)n/
noun
  1. the action or process of working together to the same end.
    “they worked in close cooperation with the British Tourist Authority”
    synonyms: collaboration, working together, joint action, combined effort, teamwork, mutual support, partnershipcoopetitioncoordinationliaisonassociationsynergyunityconcurrenceconcordaccordunderstanding, give and take, compromiseMore

    • assistance, especially by complying readily with requests.
      “we should like to ask for your cooperation in the survey”
      synonyms: assistance, helpfulness, help, helping hand, aid, abettance, supportbackingcontributionparticipation;