There are many other synonyms for the word "attempt" that can be used to add variety to your writing. "Try" is a very common synonym that can be used to indicate an effort to achieve something. "Effort" is another word that can be used to imply an attempt at something difficult. "Endeavor" is another synonym that conveys determination, while "undertaking" suggests a larger or more complex effort. "Venture" is a more adventurous word that implies taking a risk in attempting something. "Assay" is a synonym more commonly used in scientific or experimental contexts. In short, there are many synonyms for "attempt" that can help spice up your writing and convey a range of effort and determination.