#rear.side__back  the side that goes last or is not normally seen; "he wrote the date on the back of the photograph"
  exclusion:  front
  supertype:  object_side__side  an extended outer surface of an object; "he turned the box over to examine the bottom side"; "they painted all four sides of the house"
  subtype:  stern__after_part__afterpart__quarter__poop__tail  the rear part of a ship
  subtype:  tail_assembly__tail__empennage  the rear part of an aircraft

No statement uses or specializes rear.side; click here to add one.