What is another word for cooperator?
Pronunciation: [kə͡ʊˈɒpəɹˌe͡ɪtə] (IPA) 
Synonyms for the word "cooperator" include collaborator, partner, colleague, ally, teammate, associate, supporter, helper, and contributor. These terms all refer to individuals who work together towards a common goal or purpose. A collaborator is someone who works jointly with others to achieve a shared objective, while a partner denotes a person who shares responsibility and works closely with another. A colleague refers to someone who works in the same profession or occupation, while an ally is someone who provides assistance and support. A teammate is a member of the same team, while an associate is a person with whom one has a professional relationship. A supporter, helper, and contributor are individuals who assist and aid in the achievement of a particular goal.
