Oclusion or Occlusion: How To spell?
The word Oclusion is misspelled against Occlusion, a noun meaning "The act of occluding, or the state of being occluded."
Occlusion has double "cc" is mispronounced as "c"Remember double 'CC' in between the strings O & lusion which should not be misspelled with single 'C'
Wrong Spelling:  O-c-lusion  Correct Spelling:  O-cc-lusion 
Check more misspelled words of Occlusion to spell it correct.