Caison or Caisson: How To spell?

The word Caison is misspelled against Caisson, a noun meaning "A chest filled with explosive materials, to be laid in the way of an enemy and exploded on his approach."

Caisson has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings cai & on which should not be misspelled with single 'S'
Wrong Spelling: cai-s-on
Correct Spelling: cai-ss-on
Find more incorrect spellings of Caisson to spell right way.