The word "informalize" is used to describe the process of making something less formal, less strict or less structured. There are many synonyms for this word that can be used to describe this process, including "relax", "loosen", "casualize", "deformalize" and "unconventionalize". Other synonyms include "ease up", "dilute", "soften", "chill out", "slacken off" and "make easy". These terms can be used in a variety of situations, including in the workplace, at home or in social situations, where a more relaxed and informal approach is desired. By using these synonyms, you can effectively communicate the idea of making something less formal in a way that is clear and concise.