accident
alerting
attention
bid
black
button
caution
danger
dangerous
emblem
fall
falling
general warning
hazard
hazardous
head
ice
icon
illustration
information
injury
ionizing radiation risk
isolated
label
law
material
materials
meaning
message
pictogram
plate
protection
risk
safety
security
set
shield
sign
signal
slippery
soap
stop
symbol
triangle
warning
watch
white
workers
yellow