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