Related by context. Frequent words. (Click for all words.) 61 extraterrestrials 58 extraterrestrial 58 beings 57 alien 56 aliens 55 earthlings 53 outer space 53 Earthlings 53 mythical creatures 52 astral 51 creatures 51 cyborgs 51 monsters 50 flying saucers 50 UFOs 50 wormhole 49 cosmos 49 intergalactic 49 supernatural 48 Martians 48 celestial 48 sentient 48 earthly 48 interstellar 47 humankind 47 Decepticon 47 mankind 47 celestial bodies 47 teleportation 47 Cylons 47 mysterious 47 parallel universes 46 alien invaders 46 Brainiac 46 cosmic 46 Luthor 46 demonic 46 telepathy 46 mutants 46 humanoid 46 Greek gods 46 Skynet 46 otherworldly 46 Autobots 45 beasties 45 cyborg 45 planet 45 spacecrafts 45 humanoids 45 Martian 45 mystical 45 planets 45 androids 45 undead 45 supernatural powers 45 UFO 45 interplanetary 45 cosmic radiation 44 planetary 44 Zod 44 Decepticons 44 zombies 44 homo sapiens 44 robots 44 spaceships 43 spaceship 43 cybernetic 43 telepathic 43 psychic abilities 43 Illuminati 43 Jor El 43 bots 43 Magisterium 43 alternate universe 43 malevolent 43 fairies 43 universe 43 Earth 43 flying saucer 43 omniscient 42 sprites 42 creature 42 guardian angels 42 TARDIS 42 artificial intelligence 42 evil 42 angels 42 asteroids 42 humans 42 Daleks 42 phantoms 42 creepy 42 orb 42 ancients 42 human beings 42 god 42 godlike 42 mystics 42 Red Planet 42 adventurers 42 galactic