KEY: Substantial.
SYN: Existing, real, solid, true, corporeal, material, strong, stout,massive, bulky, tangible.
ANT: Imaginary, unreal, insubstantial, fictitious, supposititious,incorporeal, chimerical, visionary, immaterial, weak, frail, airy,disembodied, spiritual, ghostly.

• Irrefragable, [See REFRAGABLE]
• Irrefutable, [See REFRAGABLE]
• Irregular, [See REGULAR]
• Irrelevant, [See RELEVANT]
• Irreligions
• irreligion, [See RELIGION]
• Irremediable, [See REMEDIABLE]
• Irremissible
• Irremovable
• Irreparable, [See REPARABLE]
• Irreprehensible, [See REPREHENSIBLE]
• Irrepressible
• Irreproachable, [See BLAMELESS]
• Irreprovable
• Irresistible, [See RESISTIBLE]
• Irresolute, [See RESOLUTE]
• Irrespective, [See RESPECTIVE]
• Irresponsible
• Irretrievable, [See RETRIEVABLE]
• Irreverence, [See REVERENCE]
• Irreversible, [See REVERSIBLE]
• Irrevocable, [See REVERSIBLE]
• Irrigate
• Irrigation, [See IRRIGATE]
• Irritable, [See HASTY]