A "whiz-kid" is a term used to describe someone who is exceptionally talented or skilled in a particular domain. There are many synonyms for this term, including prodigy, genius, wunderkind, and phenom. A prodigy is someone who demonstrates exceptional abilities in a specific field at a young age. A genius is someone with exceptional intellectual abilities across a range of domains. A wunderkind is a child prodigy, whereas a phenom is someone who excels at a young age and continues to do so throughout their career. Other synonyms for whiz-kid include high achiever, brainiac, and visionary, all of which describe someone who possesses exceptional abilities and a natural aptitude for success.