Chalis or Challis: How To spell?
The word Chalis is misspelled against Challis, a noun meaning "A soft and delicate woolen, or woolen and silk, fabric, for ladies' dresses."
Challis has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings cha & is which should not be misspelled with single 'L'
Wrong Spelling:  cha-l-is  Correct Spelling:  cha-ll-is 
Find more wrongly spelled words of Challis to spell it well.