There are various synonyms for the phrase "in the making," which means something that is still in the process of becoming or developing. One of the similar expressions is "in progress," which is often used interchangeably to describe something that is currently happening or being done. Another synonym is "in production," implying that something is being created or made and still requires some time before it can be fully realized. "Under construction" is another frequently used phrase, which denotes a process of building or assembling something that has not been completed yet. "Under development" and "in the works" are also similar alternatives that suggest something is being worked on and will be finished at a later date.