The phrase "using for ends" refers to a manipulative approach to achieving one's objectives or goals. There are a variety of synonyms that can be used to describe this behavior, including exploiting, manipulating, maneuvering, leveraging, and capitalizing on. Each of these terms suggests a degree of intent and calculation in the pursuit of one's goals. They imply a certain level of strategic thinking and an ability to use others or resources to achieve one's desired outcome. While these terms can have negative connotations, they can also be used positively in the context of achieving one's goals ethically and responsibly.