- 2Significato: holehollow depression basin indentationcrater bowl recess cavity
- 3Significato: valleydepth gulf pit shaftwell crater chasm abyss
- 4Significato: channelhollow groove furrow dipcup crater trough
- 5Significato: excavationpit hole hollow craterlode shaft quarry
- 6Significato: thinghole cavity depression basin indentationcrater bowl recess hollow