| SERAC | Swiss-French word for a column of glacial ice such as the one overhanging the couloir of the Bottleneck on K2 (5) |
| REGLET | Word, from French for "little rule", for a column of a page originally, later a narrow band separating mouldings; a fillet; or, a strip of wood for making white spaces between type in printing (6) |
| GLACIERS | Large slow-moving masses of ice such as New Zealand's Franz Josef and Canada's Donjek |
| EAVES | Part of a roof overhanging the walls of a building (5) |
| BLACK | Colour of the markers indicating the most challenging ski runs, such as Grand Couloir in Courchevel (5) |
| NORTHFACE | Section of Mount Everest featuring the Norton Couloir (5,4) |
| CORRIDOR | Couloir |
| HALLWAY | Couloir |
| INCH | Unit of pressure exerted by a column of mercury in a barometer; one twelfth of a foot or 2.54 cm; or, a unit of rainfall in meteorology (4) |
| LINE | A column of soldiers, crocodile of schoolchildren, queue of traffic, row of chessboard squares or other line-like formation; or, a dossier (4) |
| POLYGON | A "many-sided" closed shape observed in things from a crystal, honeycomb, snowflake or star fruit slice to a column of basalt rock, frozen puddle, plant stem crosssection or slither of cracked ice (7) |
| PEBBLE | A stone from a beach, hillside, lake, mountain or river, smoothed by the action of water or glacial ice (6) |
| FLOE | Pretty big chunk of glacial ice |
| NEVE | Field of glacial ice |
| ATMOSPHERE | A unit of pressure equivalent to the pressure that will support a column of mercury 760mm high at 0 degrees Celsius at sea level |
| THERMAL | A column of rising air caused by local unequal heating of the land surface (7) |
| LAKEGENEVA | Lausanne and Montreux are located on which body of water on the Swiss-French border? (4,6) |
| RAY | A column of light (as from a beacon). |
| MENISCUS | What is the convex or concave upper surface of a column of liquid (8) |
| WHIRLWIND | A column of air which spins round very fast and moves along the land or ocean surface (9) |
