44 Moby Thesaurus words for "burn the midnight oil": be behindhand, be late, be overdue, bone, con, contemplate, dig, do double duty, drill, elucubrate, examine, get up late, go over, grind, hit the ball, hustle, keep everyone waiting, keep late hours, lucubrate, miss the boat, oversleep, overwork, peruse, plunge into, pore over, pour it on, practice, read, regard studiously, restudy, review, scratch, show up late, slave, stay late, stay up late, study, sweat, swot, vet, wade through, work hard, work late, work overtime

Source: Moby Thesaurus II by Grady Ward, 1.0