Buzing or Buzzing: How To spell?
The word Buzing is misspelled against Buzzing, which is present continuous of "Buzz"
Buzzing has double "zz" is mispronounced as "z"Remember double 'ZZ' in between the strings bu & ing which should not be misspelled with single 'Z'
Wrong Spelling:  bu-z-ing  Correct Spelling:  bu-zz-ing 
Check more misspelled words of Buzzing to spell it correct.