1. The state of being dual or double.

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

• mulity,
• qualidy,
• quolity,
• quiality,
• duity,
• gulity,
• uility,
• qualty,
• loality,
• qualiity,
• quuality,
• qauality,
• qualifty,
• quaility,
• vality,
• dualility,
• qualtity,
• qualiti,
• wquality,
• cuallity

• reality,
• Dealt,
• quality,
• dually,
• duluth.

The adjective form of the word "duality" is "dual".

The plural of the "duality" can be the "dualities".

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