Associator is a word that refers to an individual or an organization that is involved in a particular association or group. While this word may be appropriate in certain contexts, there are many synonyms that can be used instead to add variety to your writing. Some synonyms for associator include member, participant, contributor, partner, collaborator, affiliate, supporter, advocate, follower, and ally. Using these alternate terms can not only help you avoid repetition in your writing, but it can also create a more diverse range of descriptors for the people, organizations, or groups you are discussing.