When it comes to achieving success in any given field, it's important to put in optimum efforts. However, using the same phrase repeatedly can make your writing or speech a bit monotonous. Fortunately, there are several synonyms for optimum efforts that you can use instead. These include maximum effort, best possible effort, greatest possible endeavor, superior attempt, ideal exertion and supreme try. Using these synonyms can help add variety to your writing while still conveying the same message. So, whether you're giving a speech, writing an essay or working on a project, try out these synonyms and see how they add a new flair to your communication.