Biterness or Bitterness: How To spell?
The word Biterness is misspelled against Bitterness, a noun meaning "A state of extreme impiety or enmity to God."
Bitterness has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings bi & erness which should not be misspelled with single 'T'
Wrong Spelling:  bi-t-erness  Correct Spelling:  bi-tt-erness 
Find more wrongly spelled words of Bitterness to spell it well.