abstain
anti
attention
ban
caution
control
diagonal
dont
forbid
forbidden
form
hazard
hexagon
hexagonal
icon
illegal
illustration
indication
information
isolated
message
negative
no
not
notice
pictogram
poster
prohibit
prohibited
prohibiting
prohibition
public
red
restrict
rules
safety
shape
sign
silhouette
slash
sticker
stop
symbol
text
warn
warning
white
word
zone