All practical antonyms

adj practical

• irrational — without the faculty of reason; deprived of reason.
• unrealistic — interested in, concerned with, or based on what is real or practical: a realistic estimate of costs; a realistic planner.
• unsound — not sound; unhealthy, diseased, or disordered, as the body or mind.
• inefficient — not efficient; unable to effect or achieve the desired result with reasonable economy of means.
• impractical — not practical or useful.
• unfeasible — capable of being done, effected, or accomplished: a feasible plan.
• unlikely — not likely to be or occur; improbable; marked by doubt.
• useless — of no use; not serving the purpose or any purpose; unavailing or futile: It is useless to reason with him.
• worthless — without worth; of no use, importance, or value; good-for-nothing: a worthless person; a worthless contract.
• incapable — not capable.
• inexperienced — not experienced; lacking knowledge, skill, or wisdom gained from experience.
• unseasoned — (of things) not seasoned; not matured, dried, etc., by due seasoning: unseasoned wood.
• unskilled — of or relating to workers who lack technical training or skill.
• unreasonable — not reasonable or rational; acting at variance with or contrary to reason; not guided by reason or sound judgment; irrational: an unreasonable person.
• impossible — not possible; unable to be, exist, happen, etc.
• unattainable — capable of being attained.
• unworkable — practicable or feasible: He needs a workable schedule.
• serviceability — capable of or being of service; useful.
• untrained — Railroads. a self-propelled, connected group of rolling stock.
• impotent — not potent; lacking power or ability.
• ineffective — not effective; not producing results; ineffectual: ineffective efforts; ineffective remedies.
• weak — not strong; liable to yield, break, or collapse under pressure or strain; fragile; frail: a weak fortress; a weak spot in armor.