rift
1. [ noun ] a gap between cloud masses
Examples:

"the sun shone through a rift in the clouds"

Related terms: opening
2. [ noun ] a narrow fissure in rock
Related terms: crack
3. [ noun ] a personal or social separation (as between opposing factions)
Synonyms: break breach severance falling_out rupture
Examples:

"they hoped to avoid a break in relations"

Related terms: separation sever
Similar spelling:   rivet
  Rivett
  Rivette