戦闘【せんとう】
battle, fight, combat
闘争【とうそう】
fight, battle, combat, conflict, struggle (for rights, higher wages, etc.), strife, (labor) dispute, strike
春闘【しゅんとう】
spring labor offensive, annual spring wage bargaining round
格闘【かくとう】
(hand-to-hand) fight, grapple, scuffle, tussle, struggling (with a problem, task, etc.), grappling, wrestling, getting to grips (with)
敢闘【かんとう】
fighting bravely
奮闘【ふんとう】
strenuous effort, hard struggle, working hard, hard fighting, fierce fighting