Synonyms and related words :
boutade, brainstorm, calf love, capriccio, caprice, case, conceit, crank, craze, crazy idea, crotchet, crush, fad, fancy, fantastic notion, fantasy, flimflam, fool notion, freak, freakish inspiration, harebrained idea, humor, infatuation, kink, maggot, mash, megrim, notion, pash, puppy love, quirk, toy, vagary, whim, whim-wham, whimsy