Extraterrestrial life, sometimes called alien life, occurs outside the Earth and not originated from Earth. No extraterrestrial life species have been found as yet, although all the efforts are still being made if any such extraterrestrial life exists.
Such a life could come from simple species compared to prokaryotes, intelligent creatures, and even intelligent beings who may have built the civilization that is far superior and advanced to that of humankind.
The science of extraterrestrial life of all kinds is known as astrobiology, a multidisciplinary field that investigates determining conditions and interdependent events in which life emerges, spreads, and evolves in the universe.
Words to Describe Aliens
Following is a list of adjective words for describing aliens:
| Aberrant | Not Domestic | Galactic |
| Abnormal | Not Native | Heavenly |
| Adopted | Not Naturalized | Immigrant |
| Adventitious | Not Of This World | Imported |
| Alternative | Novel | In Space |
| Anomalous | Obscure | In The Heavens |
| Antipodal | Odd | In The Sky |
| Astral | Oddball | Inaccessible |
| Astronomical | Off The Wall | Intergalactic |
| Atypical | Offbeat | Interplanetary |
| Beyond Your Ken | Off-Centre | Interstellar |
| Bizarre | Offshore | Introduced |
| Celestial | Original | Irregular |
| Cosmic | Otherworldly | Isolated |
| Cosmogonal | Other-Worldly | Jovian |
| Curious | Out Of The Way | Kinky |
| Detached | Outer Space | Left-Field |
| Deviant | Outside | Little Known |
| Different | Overseas | Lunar |
| Dissimilar | Paradisiac | Martian |
| Distant | Paradise | New |
| Eccentric | Peculiar | Nonnative |
| Ecumenical | Peregrine | Nonresident |
| Elysian | Quirky | Funny |
| Empyreal | Rare | Unheard Of |
| Especial | Remarkable | Unexplored |
| Ethereal | Remote | Far-Fetched |
| Exceptional | Removed | Unique |
| Exotic | Singular | Far-Removed |
| Expatriate | Solar | Unfamiliar |
| External | Something Else | Uninvestigated |
| Extra local | Space | Unearthly |
| Extramundane | Stellar | Faraway |
| Extraneous | Strange | Fresh |
| Extraordinary | Supernal | Freaky |
| Extraterrestrial | Super terrestrial | Freak |
| Extraterritorial | Surprising | Foreign |
| Extrinsic | Tropical | Weird |
| Fantastic | Unaccustomed | Way Out |
| Far Flung | Uncanny | Wacky |
| Far Off | Undiscovered | Unknown |
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