Mulion or Mullion: How To spell?
The word Mulion is misspelled against Mullion, a noun meaning "A slender bar or pier which forms the division between the lights of windows, screens, etc."
Mullion has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings mu & ion which should not be misspelled with single 'L'
Wrong Spelling:  mu-l-ion  Correct Spelling:  mu-ll-ion 
Check more misspelled words of Mullion to spell it correct.