pipe dream (n.)
- absentmindedness
- absorption
- abstractedness
- abstraction
- autism
- bemusement
- bubble
- chimera
- daydream
- daydreamer
- daydreaming
- deception
- delusion
- dream
- dreaming
- dreamland
- dreamworld
- engrossment
- fantasy
- illusion
- incubus
- misconception
- moon
- muse
- musing
- nightmare
- preoccupation
- reverie
- self-deceit
- self-deception
- stargazing
- stray
- study
- trance
- trick
- trip
- utopia
- vapor
- vision
- woolgathering