rift

nouns

a gap between cloud masses
"the sun shone through a rift in the clouds"
rift
is a type of (narrower)
an open or empty space in or between things
"there was a small opening between the trees"; "the explosion made a gap in the wall"
gap, opening
a narrow fissure in rock
rift
is a type of (narrower)
a long narrow opening
cleft, crack, crevice, fissure, scissure
a personal or social separation (as between opposing factions)
"they hoped to avoid a break in relations"
breach, break, falling out, rift, rupture, severance