The word "sureshot" is often used to refer to something that is a definite or guaranteed success. However, there are many alternative words and phrases that can be used to convey a similar meaning. Some examples include "foolproof," "guaranteed," "certain," "undeniable," "unquestionable," "definite," "secure," "predictable," "reliable," and "assured." Additionally, idioms such as "a slam dunk" or "a home run" can also imply a surefire success. Ultimately, it's important to choose the appropriate synonym based on the context and intended tone to effectively convey the intended message.