Necesarianism or Necessarianism: How To spell?
The word Necesarianism is misspelled against Necessarianism, a noun meaning "The doctrine of philosophical necessity; necessitarianism."
Necessarianism has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings nece & arianism which should not be misspelled with single 'S'
Wrong Spelling:  nece-s-arianism  Correct Spelling:  nece-ss-arianism 
Find more wrongly spelled words of Necessarianism to spell it well.