When it comes to expressing someone's capability of doing something, the phrase "able to" often comes to mind. However, there are several other synonyms that can be used to convey the same meaning, such as "capable of," "competent at," "adept at," "proficient in," and "skilled in." These alternatives provide a more descriptive and nuanced approach to describing someone's abilities, lending a different tone to your writing depending on which word you choose. For instance, "competent at" suggests a basic level of proficiency, while "skilled in" implies a higher degree of mastery. By using synonyms for "able to," you can add more variety and depth to your writing.