alarm
alert
background
caution
checking
container
danger
emergency
equipment
extinguish
extinguisher
extinguishers
extinguishing
fighting
fire
firefighter
flame
foam
hand
hazard
holding
hose
human
hydrant
industry
isolated
male
man
metal
nozzle
object
office
person
pin
precaution
pressure
prevent
prevention
professional
protect
protection
red
safety
security
spray
system
training
wall
warning
white