Abseil - Acetazolamide - Action Directe - Altitude sickness (also known as: Acute mountain sickness (AMS)) - Aid climbing - Aider - Alcove (climbing) - knot - Apron - Alpine hut - Alpine style - Anchor (climbing) - Angle (climbing) - Arête - Ascension (climbing) - Australian rappel - Avalanche
Ball-nuts - Base camp - Bat hook - Belay - Belay device - Belay slave - Belay station - Big wall climb - Birdbeak - Bivouac or Bivi - Black ice - Blue ice - Boreal - Boulder - Bouldering - Bowline - Bowyangs - Buildering - Butterfly knot
California Mountaineering Group - Cam - Campus (see campus board) - Campus board - Carabiner or Biner - Chimney - Chimneying - Chipped hold - Chipping - Choss - Chute - Cirque - Clean climbing - Cliff - Cliffhanger (climbing) - Climbing area - Climbing command - Climbing equipment - Climbing gym - Climbing harness - Climbing injuries - Climbing route - Climbing shoe - Climbing technique - Climbing wall - Clothing (climbing) - Clove hitch - Col - Couloir - Copperhead (climbing) - Cord - Corner (climbing) - Cornice - Crack climbing - Crag - Crampons - Crevasse - Crimp (climbing)