The term 'Returned to Earth' can be summarized by two crossword solutions: 'Rotted' (6 letters) and 'ALIT' (4 letters). 'Rotted' is a verb meaning to decay or decompose, while 'ALIT' is a verb meaning to descend or settle. Together, these two words suggest that something has decayed or decomposed and then descended or settled back on Earth. This could refer to a spacecraft that has re-entered the atmosphere and landed, or an object that has been in space for a long time and has now returned to Earth.