The phrase "to do" is a common phrase used in everyday language. It can refer to a wide range of activities such as completing tasks, carrying out responsibilities, or performing actions. Some common synonyms for "to do" include execute, accomplish, perform, undertake, and carry out. Other synonyms include complete, fulfill, finish, achieve, tackle, and manage. Each of these terms carries a slightly different connotation, but all can be used interchangeably with "to do." Using synonyms can make your writing more varied and interesting, and can help you avoid repetition while still conveying the same idea.