Controler or Controller: How To spell?

The word Controler is misspelled against Controller, a noun meaning "An iron block, usually bolted to a ship's deck, for controlling the running out of a chain cable. The links of the cable tend to drop into hollows in the block, and thus hold fast until disengaged."

Controller has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings contro & er which should not be misspelled with single 'L'
Wrong Spelling:  contro-l-er 
Correct Spelling:  contro-ll-er 
Find more incorrect spellings of Controller to spell right way.