(n.) The quality or state of being insuperable; insuperableness.

autism autistic thinking awkwardness bulkiness clumsiness cumbersomeness dereism dereistic thinking dreamery flight of fancy hulkiness ideal idealism ideality idealization imaginative exercise impracticability inconvenience inoperability insuperability play of fancy ponderousness quixotism quixotry romance romanticism uncompassability unhandiness unmanageability unpracticability unpracticalness unrealism unreality unrealizability unwieldiness unworkability utopianism visionariness wish fulfillment wish-fulfillment fantasy wishful thinking