Thesaarus or Thesaurus: How To spell?
The word Thesaarus is misspelled against Thesaurus, a noun meaning "A treasury or storehouse; hence, a repository, especially of knowledge; -- often applied to a comprehensive work, like a dictionary or cyclopedia."
Word contains consecutive vowels 'AU' in between alphabets thes & rus is misspelled as 'AA'Wrong Spelling:  thes-aa-rus  Correct Spelling:  thes-au-rus 
Check more misspelled words of Thesaurus to spell it correct.