xenoengineering
xenotechnology
xenoscience
xenomorphology
xenophysics
extraterrestrialization
exocommunication
xenogeology
cosmogenous
xenobacteriology
xenocytology
xenomicrobiology
xenobiochemistry
alien
astrobiology
space biology
exobiology
space invader
unidentified flying object
flying saucer
xenobiology
UFO
alienesque
xeno-
extraterrene
xenochemistry
eetee
xenopaleontology
xenoarchitecture
bug-eyed monster
extraplanetary
ultratelluric
xenoanthropology
alienkind
xenohistory
astrohistory
extramundane
allotrious
ultramundane
alienly
xenobotany
spacy
xenomythology
visitor
xenonatomy
xenomorph
extraterrestriality
space alien
other
ayy