Working on is a ubiquitous phrase that we use in our daily lives. During conversations, we often hear people say, "I am working on it" or "I have been working on this project for days." However, if you want to add more variety to your vocabulary, there are many synonyms for working on. Some of them include: laboring, toiling, striving, endeavoring, hustling, grinding, and persisting. While each of these words has a slightly different connotation, they all generally refer to putting effort into a task or project. Next time you want to describe what you're doing, consider using one of these synonyms instead of relying on the same old phrase.