There are numerous different ways to express the concept of "finish with." One of the most popular synonyms is "complete," which can be used interchangeably with "finish" in many contexts. Other options include "wrap up," "conclude," "end," "finalize," "bring to a close," "put an end to," "draw to a close," and "wind up." Each of these phrases conveys a slightly different nuance or tone, so it's important to choose the right synonym depending on what you're trying to express in your writing or conversation. Ultimately, the goal of any synonym is to help you communicate your ideas more effectively and efficiently.