The phrase "under way" means that something is in progress or has started. If you are looking for synonyms for this phrase, there are several options to choose from. For instance, you can replace "under way" with "in motion," "in operation," "in progress," "developing," "advancing," "commenced," "launched," "initiated," "started," "ongoing," "in full swing," "proceeding," "undergoing," or "evolving." Each of these synonyms captures the essence of something that is currently happening or in the process of happening. By using these synonyms, you can add variety to your writing or speech while still conveying the same meaning as "under way".