extraterrestrial
ultratelluric
Earthish
extramundane
Earthan
alienesque
ultramundane
extraplanetary
space invader
alienism
extraterrestrial object
exogenic
estraterrestrial body
exoplanetary
space alien
eetee
sky-born
exogenetic
alienage
extrasolar
spaceling
landing
terraneous
deep-sky
xenogeology
Terran
foreign
Earthship
from the face of the earth
extraterrestrial being
cosmogenous
alien
starman
meteoric
alienly
outworlder
off-worlder
exoatmospheric
Marcionist
alienlike
alienans
alienish
skyling
exoterrene
unearthly
earthiness
space travel
Earthian
Earthite
Earther
final frontier
spaceflight
telluric
spacefaring
otherworldy
earthly
spacy
visitor
xeno-
terrenely
earthborn
planetologic
xenogenic
alienness
mysterious
xenomorph
terranean
interplanetarian
cast
peregrine
Pleiadean
Earthican
flying saucer
other
UFO
bug-eyed monster
unidentified flying object
exoplanet
ayy
intratelluric
extraterrestrially
planetary body
Earthsider
earthwardly
moon-man
terrestrially
sylph
marsling
astrophilosophy