bugbear
bogeyman
booger
boogeyman
goblin
hobgoblin
ogre
scarecrow
specter
concern
headache
monster
vexation
worry
Baconian
Spencerian
bogle
bogy
domineer
epistemological
gremlin
guff
hearsay
hoodoo
idiopathic
kelpie
moulded
much-disputed
notice-board
orc
pettifogging
pixy
roadshow
sensationalistic
wierd