access
advisory
alert
anatomical
background
beware
black
blocked
bone
care
caution
cemetery
corpse
cranium
crossbones
danger
dangerous
dead
deadly
death
decoration
face
hazard
head
health
hell
horror
industry
isolated
object
old
orange
past
restriction
rotten
safety
scary
sign
signage
skeleton
skull
spooky
stop
surface
symbol
toxic
triangle
warning
white
yellow