A fatuous attempt can be described in a number of different ways. Some common synonyms for this phrase include foolish endeavor, senseless undertaking, and misguided effort. Other possible options include senseless endeavor, foolish endeavor, and pointless attempt. Regardless of the specific words chosen, all of these phrases convey a sense of futility and lack of purpose. They all suggest that the person or group attempting the task is wasting their time and resources, and that the outcome is unlikely to be successful. In general, using one of these synonyms can help to liven up your writing and add more color to your descriptions of failed attempts.