Answer: brainiac

AnswerCrossword Clue
BRAINIACEinstein type
BRAINIACGenius
BRAINIAC2006 Ken Jennings book ... or the author himself
BRAINIACEinstein
BRAINIACComic book villain
brainiaca very intelligent person
brainiaca very intelligent person
brainiacextremely intelligent person; intellectual
brainiacextremely intelligent