Synonyms and related words :
Walter Mitty, absence of mind, absentmindedness, absorption, abstractedness, abstraction, amnesia, bad dream, bemusement, brown study, castle-building, catalepsy, cataplexy, catatonic stupor, close study, concentration, contemplation, contemplativeness, daydream, daydreamer, daydreaming, daze, deep thought, depth of thought, dream, dream state, dreaming, engrossment, fantasy, fantasying, fit of abstraction, fugue, fugue state, hypnotic trance, incubus, meditation, melancholy, mooning, moonraking, muse, musefulness, musing, muted ecstasy, nightmare, pensiveness, pipe dream, pipe-dreaming, preoccupation, profound thought, reflectiveness, sleepwalking, somnambulism, speculativeness, stargazing, study, stupor, thought, thoughtfulness, trance, vision, wistfulness, woolgathering