Deathlines or Deathliness: How To spell?
The word Deathlines is misspelled against Deathliness, a noun meaning "The quality of being deathly; deadliness."
Deathliness has double 'ss' in the end mispronounced as 's'Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  deathline-s  Correct Spelling:  deathline-ss 
Find more wrongly spelled words of Deathliness to spell it well.