The term "wast of use" is often used to refer to something that serves no practical purpose or has no value. On the other hand, the antonyms for this phrase include words like beneficial, useful, advantageous, and productive. These words refer to things that are meaningful and valuable in some way, such as a useful tool, a productive activity or a beneficial program. When something is beneficial, it has a positive effect on a person or situation, providing value and improving the overall outcome. So, when looking for alternatives to "wast of use," it is important to focus on words that highlight the value and benefit of something.