Ravine

18 clues
Ditch
Gulch
Gully
Gorge
Arroyo
Hollow
Canyon
Coulee
 Chasm
Deep gorge
Deep chasm
Small valley
Narrow gorge
Narrow cleft
Narrow valley
Canyon cousin
Steep-sided valley
Product of erosion
Similar answers:
Aaline
Abillinequity
Abnormalcraving
Aborigine
Aborigines
Absolutegravity
Abstained
Abstainers
Abstinence
Abstinent
Abstinentminded
Abusinessaffair
Achickenineverytot
Achiness
Achorusline
Achugofwine
Aclorisline
Acridine
Actionline
Actnine