When it comes to describing something that has been created or brought together to form a whole, there are plenty of synonyms for "made one" available. Some possible alternatives might include phrases like "united," "combined," "joined," "fusion," "amalgamated," "merged," or "blended." Each of these terms adds a slightly different connotation to the idea of something being made one, whether emphasizing the act of bringing together disparate parts or highlighting the resulting whole that now exists. Depending on the context in which you are using this language, one or more of these synonyms may be a better fit than "made one" on its own.