" couloir "

1: a narrow opening between hillsides or mountains that can be used for passage;

  * e.g., " ... at one point the steep, ice-encrusted walls of the couloir are no more than 50 feet apart "

•  Synonyms : 

•  canyon,

•  col,

•  defile,

•  flume,

•  gap,

•  gill,

•  gorge,

•  gulch,

•  gulf,

•  kloof,

•  linn,

•  notch,

•  pass,

•  ravine,

•  saddle

•  Antonyms : 

• (N/A)