| Main Entry: | |
| Part of Speech: | noun |
| Definition: | gulf in mountain area |
| Synonyms: | coulee, glen, gorge, gulch, gully, ravine, valley |
| Notes: | a canyon is a narrow chasm with steep cliff walls formed by running water; a gorge is a deep narrow passage with steep rocky sides formed by running water; a ravine is a deep narrow steep-sided valley formed by running water |
| Antonyms: | mountain |
| Main Entry: | valley |
| Part of Speech: | noun |
| Definition: | hollow in the land |
| Synonyms: | basin, bottom, canyon, channel, coulee, dale, dell, depression, dingle, glen, gorge, lowland, notch, plain, swale, trough, vale |
| Main Entry: | lava |
| Part of Speech: | noun |
| Definition: | volcano matter |
| Synonyms: | ashes, basalt, coulee, magma, obsidian, scoria, slag |
| Notes: | lava is the molten rock from a volcano; it is called magma before it comes out |