Flowing well is an expression that is used to describe something that is functioning or progressing smoothly. There are many synonyms for flowing well, such as going swimmingly, running smoothly, working like a charm, ticking over nicely, operating flawlessly, progressing seamlessly, functioning without a hitch, gliding along, proceeding without obstacles, and moving along without incident. These synonyms can be used interchangeably, depending on the context and the nature of the situation. So, whether you are describing a project, a relationship, or a machine, you can use these synonyms to convey that everything is rolling along nicely.