Hiliness or Hilliness: How To spell?
The word Hiliness is misspelled against Hilliness, a noun meaning "The state of being hilly."
Hilliness has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings hi & iness which should not be misspelled with single 'L'
Wrong Spelling:  hi-l-iness  Correct Spelling:  hi-ll-iness 
Find more wrongly spelled words of Hilliness to spell it well.