21
adult
adults
age
alert
allowed
ban
banner
black
button
censorship
cigarette
cinema
content
danger
design
flat
forbidden
graphic
habit
health
icon
illustration
information
isolated
limit
movie
no
not
old
older
only
over
permission
prohibit
prohibition
red
restricted
round
set
sign
sticker
stop
symbol
twenty one
under
warning
white
year