Masively or Massively: How To spell?
The word Masively is misspelled against Massively, an adverb meaning "In a heavy mass."
Massively has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings ma & ively which should not be misspelled with single 'S'
Wrong Spelling:  ma-s-ively  Correct Spelling:  ma-ss-ively 
Find more wrongly spelled words of Massively to spell it well.