experience while sleeping; "She claims to never dream"; "He dreamt a strange scene"
ERSATZ
an artificial or inferior substitute or imitation
artificial and inferior; "ersatz coffee"; "substitute coffee"
Being an imitation or a substitute, usually an inferior one; artificial: ersatz coffee made mostly of chicory
ILLUSORY
based on or having the nature of an illusion; "illusive hopes of finding a better job"; "Secret activities offer presidents the alluring but often illusory promise that they can achieve foreign policy goals without the bothersome debate and open decision that are staples of democracy"
PHANTOM
something existing in perception only; "a ghostly apparition at midnight"
a ghostly appearing figure; "we were unprepared for the apparition that confronted us"
something apparently sensed but having no physical reality; "seemed to hear faint phantom bells"; "the amputee's illusion of a phantom limb"