Dulness or Dullness: How To spell?

The word Dulness is misspelled against Dullness, a noun meaning "The state of being dull; slowness; stupidity; heaviness; drowsiness; bluntness; obtuseness; dimness; want of luster; want of vividness, or of brightness."

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