rupture, breach, break, severance, rift, falling out -- (a personal or social separation (as between opposing factions); "they hoped to avoid a break in relations")
rupture -- (the act of making a sudden noisy break)
Overview of verb rupture
The verb rupture has 1 sense
tear, rupture, snap, bust -- (separate or cause to separate abruptly; "The rope snapped"; "tear the paper")