Synonyms to harebrained idea

passing fancy, 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, humor, infatuation, kink, maggot, mash, megrim, notion, pash, puppy love, quirk, toy, vagary, whim, whim-wham, whimsy, absurd idea, afebrile delirium, automatic response, blind impulse, brain wave, brainchild, bright idea, bright thought, brilliant idea, deliriousness, delirium, drive, flash, fleeting impulse, good idea, gut response, impulse, incoherence, inspiration, instinct, involuntary impulse, lingual delirium, natural impulse, quick hunch, ranting, raving, reflex, sudden thought, urge, wandering, abstract thought, act of thought, affectation, aggressive self-confidence, amour p