cañon

from The Century Dictionary.

• To become narrow and steep-walled: said of a valley.
• To enter a defile or gorge: said of a stream.
• noun The name given throughout the Cordilleran region of the United States to any rather narrow valley with more or less precipitous sides, and also frequently applied to what would properly be called in English a defile, ravine, or gorge.

from the GNU version of the Collaborative International Dictionary of English.

• noun Mexico & Western U. S. A deep gorge, ravine, or gulch, between high and steep banks, worn by water courses.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Alternative spelling of canyon.