Tretiser or Treatiser: How To spell?
The word Tretiser is misspelled against Treatiser, a noun meaning "One who writes a treatise."
Treatiser has vowels 'ea' together mispronounced as 'e'Word contains consecutive vowels 'EA' in between alphabets tr & tiser is misspelled as 'E'
Wrong Spelling:  tr-e-tiser  Correct Spelling:  tr-ea-tiser 
Find more wrongly spelled words of Treatiser to spell it well.