Synonyms and related words :
Don Quixote, Quixote, Walter Mitty, absence of mind, absentmindedness, absorption, abstractedness, abstraction, bemusement, brown study, castle-building, daydream, daydreaming, depth of thought, dream, dreamer, dreamer of dreams, dreaming, engrossment, enthusiast, escapist, fantasy, fantasying, fit of abstraction, idealist, lotus-eater, mooning, moonraking, muse, musefulness, musing, muted ecstasy, pipe dream, pipe-dreaming, preoccupation, prophet, reverie, rhapsodist, romancer, romantic, romanticist, seer, stargazing, study, trance, utopian, utopianist, utopianizer, visionary, wishful thinker, woolgathering