This page is a spellcheck for word extraterestial. All Which is Correct spellings and definitions, including "Extraterestial or extraterrestrial" 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 extraterestial, correct spelling of extraterestial, how is extraterestial spelled, spell check extraterestial, how do you spell extraterestial.