The term 'WORK HARD' can be expressed in many ways, such as SLOG, LABOR, DRIVE, HAMMER, GRIND, c, MOIL, TOIL, SLAVE, SWEAT, HUSTLE, LABOUR, STRIVE, TRAVAIL, gototown, keepgoing, and lucubrate. These words all refer to the idea of putting in a lot of effort and energy into something, whether it be physical or mental LABOR. SLOG, LABOR, DRIVE, HAMMER, GRIND, and MOIL all refer to physical LABOR, while TOIL, SLAVE, SWEAT, HUSTLE, LABOUR, STRIVE, and TRAVAIL refer to mental LABOR. Gototown, keepgoing, and lucubrate are more figurative terms that refer to the idea of perseverance and dedication. All of these words imply that one must put in a lot of effort and energy in order to achieve success.