"Best effort" refers to the maximum amount of effort one can put into achieving a certain goal. However, there are numerous synonyms to describe this level of effort. Some common alternatives include "maximum effort," "utmost effort," "optimum effort," "peak effort," and "top effort." Additionally, more complex synonyms such as "exemplary effort," "stellar effort," "meticulous effort," and "remarkable effort" can also be used. These synonyms are all great ways to express the idea of trying your absolute hardest to succeed. Whether it's at work, school, or in sports, using strong synonyms can help convey the amount of dedication and effort you are willing to put in.