闘士 （トウシ） fighter (for), militant, champion (of), boxer

闘志 （トウシ） fighting spirit, (will to) fight

敢闘 （カントウ） fighting bravely

共闘 （キョウトウ） joint struggle, common (united) front

戦う （たたかう） to make war (on), to wage war (against), to go to war (with), to fight (with), to do battle (against), to compete (against), to struggle (against adversities, etc.), to fight, to contend, to resist