Muler or Muller: How To spell?

The word Muler is misspelled against Muller, a noun meaning "A stone or thick lump of glass, or kind of pestle, flat at the bottom, used for grinding pigments or drugs, etc., upon a slab of similar material."

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