1. The state of being unsound in mind; lunacy.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• unsaneness,
• jnsaneness,
• knsaneness,
• onsaneness,
• 9nsaneness,
• 8nsaneness,
• ibsaneness,
• imsaneness,
• ijsaneness,
• ihsaneness,
• inaaneness,
• inzaneness,
• inxaneness,
• indaneness,
• ineaneness,
• inwaneness,
• inszneness,
• inssneness,
• insanents,
• insainness

• in a sense,
• ancientness,
• incenses,
• insanities,
• insanely,
• insane asylum.

The adjective form of the word "insaneness" is "insane".

The plural of the "insaneness" can be the "insanenesses".

The singular of the "insaneness" can be the "insaneness".