Headwall

In physical geography and geology the headwall of a glacial cirque is its highest cliff. ...
Found on http://en.wikipedia.org/wiki/Headwall

Headwall

A steep to vertical cliff found at the end of a valley; often the uppermost part of a Cirque.
Found on http://www.skis.com/Glossary-of-Ski-Terms/article-12-18-2012,default,pg.htm

Headwall

The upper section of a mountain where the terrain is set off from that below by being more steep.
Found on http://santiamalpineclub.org/mountain/climbing/terms/
No exact match found