10 named features carry the IAU descriptor Planitia — a low plain on Mars, out of 83 in the mapped Solar System.
The IAU assigns each feature class on each world a naming theme. Across the 10 planitiae with a recorded origin, 2 categories appear, led by Greek.
Every one has its own page, on the surface it sits on.
The same descriptor is used on 8 other worlds, for 73 more features.