bug-eyed monster
xenoarchitecture
space alien
xenogeology
bolide
saucerian
UFO
flying saucer
unidentified flying object
eetee
xenophysics
visitor
little green man
xenotechnology
xenomorphology
extraterrestrial
xenoscience
exocommunication
alienkind
xenopaleontology
xenoengineering
xenochemistry
xenobiochemistry
xenobacteriology
extraterrestrialization
xenomicrobiology
alien
space invader
ancient astronaut
alien abduction
meteor
alienage
exogenesis
meteoroid
xenobiology
extraterrestriality
extraterrestrialness
substar
star visitor
exoplanet
alienness
xenocytology
astrobiology
space biology
paleocontact hypothesis
ancient astronaut hypothesis
moon-man
exobiology
alienism
xenoethics