1. The territory of a duke, a dukedom.

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

• tachy,
• sucha,
• tuche,
• deuche,
• luchy,
• douch,
• rauchy,
• suche,
• ducher,
• duche,
• dutchs,
• dueche,
• dusch,
• tushy,
• duchs,
• tochy,
• dulche,
• dutiy,
• butchy,
• puchy

• ducky,
• dug,
• dutch,
• dusky,
• Dugay,
• ditch,
• Dux,
• touch,
• duguay,
• touchy,
• ducey.

The adjective form of the word "duchy" is "ducal".

The plural of the "duchy" can be the "duchies".

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