Whizingly or Whizzingly: How To spell?
The word Whizingly is misspelled against Whizzingly, an adverb meaning "With a whizzing sound."
Whizzingly has double "zz" is mispronounced as "z"Remember double 'ZZ' in between the strings whi & ingly which should not be misspelled with single 'Z'
Wrong Spelling:  whi-z-ingly  Correct Spelling:  whi-zz-ingly 
Find more wrongly spelled words of Whizzingly to spell it well.