"Bootless errands" is a phrase that refers to futile or useless tasks. In order to communicate this meaning more effectively, there are several synonyms that can be used. For instance, "fruitless tasks" conveys a sense of lack of productivity. "Pointless tasks" can also be used to describe actions that have no clear purpose or benefit. Additionally, "unproductive tasks" highlights the idea that such tasks do not bring any returns or results. "Wasted efforts" can also be used to describe efforts that do not yield any positive results. Ultimately, using any of these synonyms can help to more succinctly and clearly portray the concept of "bootless errands".