Crater is the term planetary geologists use for a circular depression, almost always an impact scar. 4,787 named features carry it, across 13 of the 14 mapped worlds, the largest being Rembrandt on Mercury at 716 km.
Ranked across every mapped world, by catalogued diameter.
Naming themes are set per world, so one descriptor can draw on very different sources depending on where it sits. Across all 4,787 craters, 296 categories appear.