airport
bathroom
bucket
building
careful
cart
caution
clean
cleaner
cleaning
cleaning equipment
cleanup
commercial
danger
dirty
equipment
floor
hall
hallway
hazard
household
hygiene
information
interior
janitor
janitorial
lobby
maintenance
mop
mopped
mopping
plastic
precaution
public
safety
service
set
sign
signal
slip
slippery
symbol
toilet
tool
tools
trash
warning
wet
work
yellow