Wunderkind is a term used to describe a child prodigy or someone who is exceptionally talented at a young age. The crossword solutions for this term are LULU (4 letters), ONER (4 letters) and PHENOM (6 letters). LULU is a female given name, derived from the Hawaiian word for 'PEARL'. ONER is a slang term for an extraordinary person or thing. PHENOM is a shortened version of the word phenomenon, which means an extraordinary event or circumstance.