acid
aim
alerting
antique
art
attention
chemical
clock
corrosive
countdown
cross
crosshair
danger
deadline
environment
flammable
flow
glass
harmful
hazard
hour
hourglass
hunting
icon
illustration
industry
irritant
label
liquid
military
minute
oxidizing
poison
risk
sand
sandglass
scope
security
shot
sight
sign
sniper
target
time
timer
toxic
warning
watch
weapon