aegis
arm guard
backstop
buffer
bulwark
bumper
contraceptive
copyright
crash helmet
cushion
dashboard
dodger
face mask
fender
finger guard
foot guard
fuse
goggles
governor
guard
guardrail
hand guard
handrail
hard hat
helmet
insulation
interlock
knee guard
knuckle guard
laminated glass
life preserver
lifeline
lightning conductor
lightning rod
mask
mudguard
nose guard
pad
padding
patent
pilot
preventive
prophylactic
protective clothing
protective umbrella
safeguard
safety
safety glass
safety plug
metal
metallic element
Pallas
actinide
aigrette
aluminium
anhydrous
barium
cadmium
carbonyl
cobalt
cupric
dolman
mercuric
platinum
rhodium
subgroup
succinylcholine
t-butyl
tungsten
vanadium
radium
stadium