Werewolf
Even a man who is pure in heart and says his prayers by night may become a wolf when the wolfbane blooms and the autumn moon is bright.
Western
A genre set in the American west during the late 1800s. A good western film ought to feature either Clint Eastwood or John Wayne.
Witch
An evil she-bitch who rides a broom, boils gross stuff, torments the Collins family, and does other stupid evil shit. They are all probably evil, and should all fuck off!
Xenomorph
The main alien species and antagonists in the Alien film franchise, designed by H.R. Giger. They've got mouths in their mouths and acid for blood and their heads are really long.
Zombie
A mindless re-animated corpse. Originally voodoo based slaves in 1931's White Zombie, George Romero later solidified their status as infected flesh-eaters in 1968's Night of the Living Dead.