Pretiness or Prettiness: How To spell?
The word Pretiness is misspelled against Prettiness, a noun meaning "The quality or state of being pretty; -- used sometimes in a disparaging sense."
Prettiness has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings pre & iness which should not be misspelled with single 'T'
Wrong Spelling:  pre-t-iness  Correct Spelling:  pre-tt-iness 
Find more wrongly spelled words of Prettiness to spell it well.