spook

"The building was haunted by a couple of spooks."

"The little boy was scared that a spook was hiding under his bed. "

"The big spider gave me a spook."

"The spook reported back to his superior about the suspicious activity at the school. "

"He who is infatuated with Man leaves persons out of account so far as that infatuation extends, and floats in an ideal, sacred interest. Man, you see, is not a person, but an ideal, a spook. — Max Stirner"

"The hunters were spooked when the black cat crossed their path. The movement in the bushes spooked the deer and they ran."

"The deer spooked at the sound of the dogs."

"The old house spooked the children, making them afraid to play in the backyard after dark. "