This page is a spellcheck for word extraterrestrial. All Which is Correct spellings and definitions, including "Extraterrestrial vs extraterestial" are based on official English dictionaries, which means you can browse our website with confidence! Common searches that lead to this page: how to spell extraterrestrial, correct spelling of extraterrestrial, how is extraterrestrial spelled, spell check extraterrestrial, how do you spell extraterrestrial.