Carnasial or Carnassial: How To spell?
The word Carnasial is misspelled against Carnassial, a noun meaning "A carnassial tooth; especially, the last premolar in many carnivores."
Carnassial has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings carna & ial which should not be misspelled with single 'S'
Wrong Spelling:  carna-s-ial  Correct Spelling:  carna-ss-ial 
Find more wrongly spelled words of Carnassial to spell it well.