| adjective | not practical; not workable or not given to practical matters “refloating the ship proved impractical because of the expense” |
| adjective | not practical or realizable; speculative “airy theories about socioeconomic improvement” |
| impracticality | noun | concerned with theoretical possibilities rather than actual use |
| visionary | noun | a person given to fanciful speculations and enthusiasms with little regard for what is actually possible |
| vision | noun | a vivid mental image |
| Laputa | noun | a land imagined by Jonathan Swift where impractical projects were pursued and practical projects neglected |