daydreamer (n.)

• absentmindedness
• absorption
• abstractedness
• abstraction
• bemusement
• daydream
• daydreaming
• dream
• dreamer
• dreaming
• engrossment
• enthusiast
• escapist
• fantasy
• idealist
• lotus-eater
• muse
• musing
• preoccupation
• prophet
• reverie
• romancer
• romantic
• romanticist
• seer
• stargazing
• study
• trance
• utopian
• visionary
• woolgathering