| cave(noun, form, geology, feature, land) |
| cenote(noun, form, geology, feature, land) |
| channel(noun, form, geology, feature, land) |
| cirque(noun, form, geology, feature, land) |
| cliff(noun, form, geology, feature, land) |
| coast(noun, form, geology, feature, land) |
| coastal landform(noun, expression, form, geology, feature) |
| col(noun, form, geology, feature, land) |
| complex crater(noun, expression, form, geology, feature) |
| complex volcano(noun, expression, form, geology, feature) |
| computer-oriented landform classification system(noun, expression, form, geology, feature) |
| confluence(noun, form, geology, feature, land) |
| continent(noun, form, geology, feature, land) |
| continental shelf(noun, expression, form, geology, feature) |
| coral reef(noun, expression, form, geology, feature) |
| corrie(noun, form, geology, feature, land) |
| cove(noun, form, geology, feature, land) |
| crater lake(noun, expression, form, geology, feature) |
| crevasse(noun, form, geology, feature, land) |
| crevasse splay(noun, expression, form, geology, feature) |