A Breach

1. A gap or opening made by breaking or battering, as in a wall, fortification or levee; the space between the parts of a solid body rent by violence

Synonyms: break, rupture, fissure

2. A breaking up of amicable relations, a falling-out.
3. A breaking of waters, as over a vessel or a coastal defence; the waters themselves
4. A clear breach is when the waves roll over the vessel without breaking. A clean breach is when everything on deck is swept away.

Synonyms: surge, surf

5. A breaking out upon; an assault.
6. (archaic) A bruise; a wound.
7. (archaic) A hernia; a rupture.
8. (law) A breaking or infraction of a law, or of any obligation or tie; violation; non-fulfillment
9. (figuratively) A difference in opinions, social class etc.
10. The act of breaking, in a figurative sense.

break

rift

rupture

gap