gap
noun
1 she peered through a gap in the shutters:
opening, aperture, space, breach, chink, slit, slot, vent, crack, crevice, cranny, cavity, hole, orifice, interstice, perforation, break, fracture, rift, rent, fissure, cleft, divide, discontinuity;
technical scission, grike.
2 a gap between meetings:
pause, intermission, interval, interlude, delay, break, breathing space, breather, respite, hiatus;
North American recess.