| Feature Type | Description |
| Albedo Feature | Geographic area distinguished by amount of reflected light |
| Catena | Chain of craters |
| Cavus | Hollows, irregular steep-sided depressions usually in arrays or clusters |
| Chaos | Distinctive area of broken terrain |
| Chasma | A deep, elongated, steep-sided depression |
| Colles | Small hills or knobs |
| Crater | A circular depression |
| Dorsum | Ridge |
| Facula | Bright spot |
| Farrum | Pancake-like structure, or a row of such structures |
| Flexus | A very low curvilinear ridge with a scalloped pattern |
| Fluctus | Flow terrain |
| Fossa | Long, narrow depression |
| Labes | Landslide |
| Labyrinthus | Complex of intersecting valleys or ridges |
| Linea | A dark or bright elongate marking, may be curved or straight |
| Lingula | Extension of plateau having rounded lobate or tongue-like boundaries |
| Macula | Dark spot, may be irregular |
| Mare | "Sea"; large circular plain; on Titan, large expanses of dark materials thought to be liquid hydrocarbons |
| Mensa | A flat-topped prominence with cliff-like edges |
| Mons | Mountain |
| Palus | "Swamp"; small plain |
| Patera | An irregular crater, or a complex one with scalloped edges |
| Planitia | Low plain |
| Planum | Plateau or high plain |
| Rupes | Scarp |
| Scopulus | Lobate or irregular scarp |
| Sulcus | Subparallel furrows and ridges |
| Terra | Extensive land mass |
| Tholus | Small domical mountain or hill |
| Undae | Dunes |
| Vallis | Valley |
| Vastitas | Extensive plain |