Circumvalation or Circumvallation: How To spell?

The word Circumvalation is misspelled against Circumvallation, a noun meaning "A line of field works made around a besieged place and the besieging army, to protect the camp of the besiegers against the attack of an enemy from without."

Circumvallation has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings circumva & ation which should not be misspelled with single 'L'
Wrong Spelling:  circumva-l-ation 
Correct Spelling:  circumva-ll-ation 
Check more misspelled words of Circumvallation to spell it correct.