cock
conflagration
connect
connection
connector
cover
danger
draw
emergency
equipment
extinguish
extinguishing
faucet
fire
firefighter
gage
green
hose
hydrant
industrial
industry
manhole
metal
nobody
old
outdoor
outdoors
outlet
outside
pipe
plug
plunger
pressure
protect
protection
red
rescue
rusty
safety
security
shaft
sidewalk
sign
stand
street
system
tap
urban
utility
valve