Affiliation is the act of formally connecting with an organization or group. Some common synonyms for the word "affil" include: join, associate, ally, align, team up, partner, band together, consort, collaborate, work together. These words can be used interchangeably with "affil" depending on the context in which the word is used. Whether it's joining a business or a social club, affiliating oneself with like-minded individuals is a way to work together towards a common goal. Using synonyms for "affil" helps to expand one's vocabulary and express oneself more effectively.