Tunelling or Tunnelling: How To spell?

The word Tunelling is misspelled against Tunnelling, which is present continuous of "Tunnel"

Tunnelling has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings tu & elling which should not be misspelled with single 'N'
Wrong Spelling: tu-n-elling
Correct Spelling: tu-nn-elling
Check more misspelled words of Tunnelling to spell it correct.