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