american
city
color
danger
dangerous
day
department
drop
emergency
equipment
extinguish
extinguisher
fire
fireman
grass
green
hose
hydrant
industrial
metal
nobody
object
old
outdoor
outside
pavement
pipe
plug
pressure
prevention
protect
protection
public
red
rescue
road
safe
safety
security
sidewalk
sign
spring
steel
street
summer
urban
valve
water
white