ultratelluric
extramundane
ultramundane
cosmogenous
extraterrene
extraplanetary
bug-eyed monster
xeno-
space alien
extraterrestrially
eetee
spacy
visitor
foreign
extraterrestrial
xenoethics
extraterrestriality
xenoscience
alien
xenophysics
exocommunication
alienkind
extraterrestrialness
alienesque
xenogeology
space invader
alienly
xenobiochemistry
other
saucerian
ayy
xenotechnology
little green man
xenochemistry
unidentified flying object
UFO
flying saucer
Tall White
xenomorphology
xenobiology
xenopaleontology
xenoarchitecture
alien abduction
xenoengineering
bolide
extraterrestrialization
allotrious
exoterrene
alienism
xenomorph