The word "genius" is often used to describe someone who is exceptionally talented or outstandingly intelligent. However, there are several synonyms that can be used to expand your vocabulary. For instance, "prodigy" refers to someone who demonstrates extraordinary ability or talent at an early stage of their life. "Savant" is used to describe an individual with exceptional knowledge and skills in a specific area such as art, music, science, or math. "Polymath" refers to someone with expertise in multiple fields. "Brainiac" is someone who is known for their intellectual prowess, and a "mastermind" is someone who's exceptionally good at coming up with clever solutions to complex problems.