Certonly or Certainly: How To spell?
The word Certonly is misspelled against Certainly, an adverb meaning "Without doubt or question; unquestionably."
Word contains consecutive vowels 'AI' in between alphabets cert & nly is misspelled as 'O'Wrong Spelling:  cert-o-nly  Correct Spelling:  cert-ai-nly 
Find more incorrect spellings of Certainly to spell right way.