"In running order" is a phrase that commonly refers to things that are in proper working condition. When describing the condition of a machine, car, or any mechanical device, the term "functioning" can be used as a synonym. Other synonyms include "operable," "operational," "running smoothly," or "working properly." Similarly, when talking about a person who is well-organized and efficient, phrases like "well-prepared" or "organized" can be used. Additionally, "fully operational," "in good shape," and "ready to go" are other phrases that can be used as alternatives when the context calls for it. Overall, there are many synonyms for "in running order" that can be used in various contexts.