O1V4E1R1L1A1B3O1U1R1
15 points
OVERLABOUR is validvalid
to labour excessively [v OVERLABOURED, OVERLABOURING, OVERLABOURS]
(archaic) to labour excessively, also OVERLABOR [v -ED, -ING, -S]
to labour excessively [v OVERLABOURED, OVERLABOURING, OVERLABOURS]
(archaic) to labour excessively, also OVERLABOR [v -ED, -ING, -S]