分裂【ぶんれつ】
split, division, break up
決裂【けつれつ】
breakdown (of talks, negotiations, etc.), breaking off, rupture
破裂【はれつ】
bursting, rupture, explosion, breakdown (of talks, negotiations, etc.), breaking off
裂け目【さけめ】
tear, rip, rent, slit, crack, chasm, rift