Below are possible answers for the crossword clue Brainiac.
an intellectual; a very studious and academic person; "in spite of her love of reading she denied being an egghead"
someone who has exceptional intellectual ability and originality; "Mozart was a child genius";
physicist born in Germany who formulated the special theory of relativity and the general theory of relativity; Einstein also proposed that light consists of discrete quantized bundles of energy (later called photons) (1879-1955)
a buzzing or hissing sound as of something traveling rapidly through the air; "he heard the whiz of bullets near his head"
make a soft swishing sound; "the motor whirred"; "the car engine purred"
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