Semianually or Semiannually: How To spell?
The word Semianually is misspelled against Semiannually, an adverb meaning "Every half year."
Semiannually has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings semia & ually which should not be misspelled with single 'N'
Wrong Spelling:  semia-n-ually  Correct Spelling:  semia-nn-ually 
Check more misspelled words of Semiannually to spell it correct.