Milboard or Millboard: How To spell?
The word Milboard is misspelled against Millboard, a noun meaning "A kind of stout pasteboard."
Millboard has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings mi & board which should not be misspelled with single 'L'
Wrong Spelling:  mi-l-board  Correct Spelling:  mi-ll-board 
Find more incorrect spellings of Millboard to spell right way.