apprehensive
to be apprehensive for somebody's safety

belt
safety belt

curtain
safety curtain / fire curtain / fireproof curtain

cut in
the safety device cuts in automatically

dead
dead weight safety valve

ETSC
European Transport Safety Council

factor
factor of safety

internal
internal safety valve

lock
safety lock

margin
margin for safety / safety margin

match
safety match

OSHA
...Health Administration safety

razor
safety razor

road
road safety

safety
for safety's sake

screen
safety screen

spring
spring load safety valve

valve
safety valve