Words: ideality, ideal, idea [MW]

1 a : the quality or state of being ideal b : existence only in idea
2 : something imaginary or idealized

Etymology: Middle English ydeall, from Late Latin idealis, from Latin idea
1 : a standard of perfection, beauty, or excellence
2 : one regarded as exemplifying an ideal and often taken as a model for imitation
3 : an ultimate object or aim of endeavor : GOAL

Etymology: Middle English, from Latin, from Greek, from idein to see -- more at WIT
1 a : a transcendent entity that is a real pattern of which existing things are imperfect representations b : a standard of perfection : IDEAL c : a plan for action : DESIGN