unrealistic -
not realistic; "unrealistic expectations"; "prices at unrealistic high levels"
realistic aware or expressing awareness of things as they really are; "a realistic description"; "a realistic view of the possibilities"; "a realistic appraisal of our chances"; "the actors tried to create a realistic portrayal of the Africans"
impossible not capable of occurring or being accomplished or dealt with; "an impossible dream"; "an impossible situation"
impractical not practical; not workable or not given to practical matters; "refloating the ship proved impractical because of the expense"; "he is intelligent but too impractical for commercial work"; "an impractical solution"
unreal lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria; "ghosts and other unreal entities"; "unreal propaganda serving as news"
chimerical produced by a wildly fanciful imagination; "his Utopia is not a chimerical commonwealth but a practical improvement on what already exists"- Douglas Bush
delusive,
false inappropriate to reality or facts; "delusive faith in a wonder drug"; "delusive expectations"; "false hopes"
fantastic,
wild extraordinarily good or great ; used especially as intensifiers; "a fantastic trip to the Orient"; "the film was fantastic!"; "a howling success"; "a marvelous collection of rare books"; "had a rattling conversation about politics"; "a tremendous achievement"
kafkaesque characterized by surreal distortion and a sense of impending danger; "the kafkaesque terror of the endless interrogations"
