Aptitudinal refers to one's inherent ability or talent to perform a specific task or skill. Some synonyms for aptitudinal include skilled, proficient, capable, talented, able, gifted, competent, expert, and knowledgeable. Each synonym carries a slightly different connotation, but they all convey a sense of natural ability or proficiency. "Skilled" and "proficient" suggest a high level of mastery, while "capable" and "able" emphasize the potential to learn and excel. "Talented" and "gifted" typically refer to innate abilities in a certain area, while "competent" and "expert" denote a professional level of skills and knowledge. Overall, these synonyms offer a range of options to describe one's aptitudes.