General Usage:
* Ductile: Able to be drawn out into a thin wire (e.g., a ductile metal).
* Duchess: The wife or widow of a duke.
* Duke: A male ruler of a duchy.
* Duct: A tube or channel that carries fluids, gases, or other substances.
* Duchy: A territory ruled by a duke.
* Duet: A musical composition for two performers.
* Duodecimal: Based on the number twelve.
* Duplicate: An exact copy.
* Durable: Able to withstand wear, tear, and decay.
Less Common Words:
* Ductibility: The ability to be drawn into a thin wire.
* Duodenal: Relating to the duodenum, the first part of the small intestine.
* Duplex: A building with two separate housing units, usually one above the other.
* Ductless: Without a duct.
* Ducal: Of or relating to a duke.
Note: While "duc" can be a prefix, it's not always used independently. Often, it is part of a larger word root.