Hily or Hilly: How To spell?
The word Hily is misspelled against Hilly, an adjective meaning "Abounding with hills; uneven in surface; as, a hilly country."
Hilly has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings hi & y which should not be misspelled with single 'L'
Wrong Spelling:  hi-l-y  Correct Spelling:  hi-ll-y 
Find more wrongly spelled words of Hilly to spell it well.