O1V4E1R1L1A1B3O1R1I1N1G2
18 points
OVERLABORING is validvalid
OVERLABOR, to labor excessively [v]
OVERLABOR, to cause to labor excessively; to overwork, also OVERLABOUR [v]
OVERLABOR, to labor excessively [v]
OVERLABOR, to cause to labor excessively; to overwork, also OVERLABOUR [v]