Communize is a unique and less common word. That being said, there are several synonyms and related words that can be used in its place. Some of the common synonyms for communize include collectivize, nationalize, socialize, publicize, or municipalize. These words generally refer to the process of bringing something under public ownership or control, whether it be land, assets, or services. Other related terms include democratize, popularize, or universalize, which suggest the spread of an idea or concept to a broader audience. Each of these synonyms and related words carries a slightly different meaning, but can be used interchangeably in most contexts.