(n.) The English form of the Spanish word Caon.

abysm abyss arroyo box canyon breach break cavity chap chasm check chimney chink cleft cleuch clough col coulee couloir crack cranny crevasse crevice cut cwm defile dell dike ditch donga draw excavation fault fissure flaw flume fracture furrow gap gape gash gill gorge groove gulch gulf gully hole incision joint kloof leak moat notch nullah opening pass passage ravine rent rift rime rupture scissure seam slit slot split trench valley void wadi