What is another word for co-operativeness?
Pronunciation: [kˈə͡ʊˈɒpəɹətˌɪvnəs] (IPA) 
Co-operativeness is a positive trait and it's synonyms are equally uplifting. Words like collaboration, cooperation, team spirit, and harmony can convey the same meaning as co-operativeness. These words emphasize the idea of working together toward a common goal and highlighting the importance of teamwork. Another great synonym is congeniality, which suggests compatibility and an overall agreeableness among team players. A sense of comradery is expressed in the word camaraderie, with the emphasis on common experiences and a shared sense of purpose. Lastly, the word mutualism suggests an understanding of dependencies and the benefits of working together towards achieving a common goal.
