Synonyms and related words :
aberration, bee, boutade, brainstorm, capriccio, caprice, circuitousness, conceit, crank, craze, crazy idea, crosswiseness, crotchet, daydream, declination, deflection, deflexure, deviance, deviation, deviousness, diagonality, digression, divagation, divergence, dream, excursion, fad, fancy, fantastic notion, fantasy, flimflam, fool notion, freak, freakish inspiration, harebrained idea, humor, indirection, indirectness, kink, maggot, megrim, nonconformity, notion, obliqueness, obliquity, passing fancy, quirk, skewness, squint, toy, transverseness, whim, whim-wham, whimsy