abstract
alarm
alert
allowed
attention
badge
ban
blank
blue
caution
circle
clean
communication
danger
design
empty
forbid
forbidden
glossy
graphic
hazard
icon
illustration
indication
information
isolated
mark
no
notice
pictogram
prevent
prohibit
prohibited
prohibition
protection
protest
public
red
restrict
restriction
risk
safety
sign
signal
stop
symbol
template
warning
white