1. (informal) insane

Encyclopedia: Doolally

• innumerable
• innumerableness
• innumerate
• innumerous
• inobservance
• inobservant
• inobtrusive
• Inocor
• inoculant
• inoculate
• inoculating
• inoculation
• inoculator
• inoculum
• inodorous
• inoffensive
• inoffensively
• inoperable
• inoperative
• inopportune
• inopportunely
• inopportuneness
• inordinate
• inordinately
• inordinateness