Related by context. Frequent words. (Click for all words.) 60 alien invaders 56 alien 55 aliens 54 sci fi 51 post apocalyptic 51 sci fi flick 50 sci fi thriller 50 zombie apocalypse 49 apocalypse 49 zombies 49 undead 48 intergalactic 48 nuclear holocaust 47 Armageddon 47 extraterrestrial 47 Cloverfield 47 sci fi adventure 46 extraterrestrials 46 Sci fi 46 Doomsday 46 Aliens 45 Starship Troopers 45 Galactica 45 apocalyptic 45 Invasion 45 Earthlings 45 outer space 44 superheroes 44 Luthor 44 alternate universe 44 Voltron 43 superhero 43 Autobots 43 Martians 43 Blomkamp 43 baddies 43 Skynet 43 supervillain 43 dystopian 43 cyborgs 43 Silver Surfer 42 mutants 42 prequel 42 Pearl Harbour 42 Astro Boy 42 spaceship 42 Terminators 42 Megamind 42 science fiction 42 Caprica 42 supernatural 41 Star Trek 41 droids 41 Apocalypse 41 starship 41 interstellar 41 Cylons 41 zombie 41 monsters 41 Battlestar Galactica 41 Daleks 41 Stargate Universe 41 futuristic 41 Van Helsing 41 supernatural thriller 41 sequel 41 Spidey 41 Terminator Salvation 41 Hugo Weaving 41 Golden Compass 40 Resident Evil 40 interplanetary 40 epic 40 Avengers 40 Marvel Universe 40 Mutants 40 Pitch Black 40 tentpole 40 Decepticons 40 Hellboy 40 X Men 40 LOTR 40 Ghostbusters 40 cataclysm 40 Alien 40 Aeon Flux 40 Asteroids 40 Star Wars universe 40 McClane 40 flying saucers 40 droid 40 beasties 40 spaceships 39 actioner 39 Butterfly Effect 39 asteroid 39 Brainiac 39 Cylon 39 Zombies 39 doomsday 39 Klingons