allotrious
ayy
other
foreign
alienism
alienesque
space invader
alienness
xenomorph
unidentified flying object
alienly
Pleiadean
xenotechnology
extraterrene
xenology
eetee
xenohistory
astrohistory
moon-man
alienans
xenonatomy
alienage
alienship
bug-eyed monster
xenomythology
starman
cosmogenous
estrangement
little green man
xenobotany
ultratelluric
xenosociology
xenopsychology
astrophilosophy
space alien
exocommunication
xeno-
alienish
alienize
xenoengineering
xenomedicine
alienkind
visitor
xenoscience
semialien
ultramundane
xenophysics
flying saucer
alienlike
nonalien