aid
assistance
background
belt
blue
bouy
buoy
circle
clear
color
copy space
danger
device
emergency
equipment
float
green
guard
help
life
life belt
lifebelt
lifebuoy
lifeguard
lifesaver
nobody
pool
preserve
preserver
protection
red
reflection
rescue
rescuer
ring
risk
round
safe
safety
save
saver
security
shadow
sos
summer
sunlight
survival
swim
water
white
yellow