1. bogeyman, bugbear, bugaboo, boogeyman, booger -- (an imaginary monster used to frighten children)
2. bugaboo -- (a source of concern; "the old bugaboo of inflation still bothers them")
1.
I read no "Night Thoughts"--no fustian about churchyards--no bugaboo tales--such as this. - from The Works of Edgar Allan Poe by Edgar Allan Poe
2.
Fables of nurses bugaboo for children Jehovah for men. - from Les Miserables by Victor Hugo