争い， あらそい
1. fight, dispute, feud, conflict, struggle, strife, discord, argument, quarrel, controversy
2. competition, contest, rivalry
争斗, 争端, 世仇, 冲突, 斗争, 纷争, 不和, 争论，争吵；竞赛，比赛，对抗
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競争， きょうそう
1. competition, contest, rivalry, race
2. competition (between organisms or species)
竞争、竞赛、对抗
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闘争， とうそう
1. fight, battle, combat, conflict
2. struggle (for rights, higher wages, etc.), strife, (labor) dispute, strike
tbd