rift

1 an irregular usually narrow break in a surface created by pressure a small rift opened in the earth's crust Synonyms check, chink, cleft, cranny, crevice, fissure, crack, splitRelated Words crevasse; craze, hairline; fracture, rupture; breach, gap, opening; cut, gash, incision, slit

2 an open space in a barrier (as a wall or hedge) it was possible to peek through the rift in the fence and see the ball game Synonyms breach, break, discontinuity, gulf, hiatus, hole, interstice, interval, opening, rent, gap, separation, voidRelated Words chink, cleft, crack, cranny, crevice, fissure; notch, slit, slot, split; interspace, pore; abyss, aperture, cavity, chasm, gape, orifice; fracture, rupture, severance, sundering