Necesities or Necessities: How To spell?
The word Necesities is misspelled against Necessities, which is plural of "Necessity"
Necessities has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings nece & ities which should not be misspelled with single 'S'
Wrong Spelling:  nece-s-ities  Correct Spelling:  nece-ss-ities 
Find more wrongly spelled words of Necessities to spell it well.