Bilboard or Billboard: How To spell?

The word Bilboard is misspelled against Billboard, a noun meaning "A flat surface, as of a panel or of a fence, on which bills are posted; a bulletin board."

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