crack up, quip, snap, cranny, chap, fling, chip, cleft, whirl, scissure, more...

mend, repair, seal, fuse, heal

sharp, first, loud, small, single, large, narrow, little, long, tiny, initial

narrow opening,   open slightly,   to snap,   small gap,   open a bit,   a slight hole,   whip sound,   open a little,   snapping sound,   rift or fissure