architect
build
builder
business
cap
caution
construction
contractor
damage
danger
employee
engineer
equipment
gear
hard
hardhat
hat
head
header
headgear
helmet
industrial
industry
isolated
job
labor
life
maintenance
manufacture
mine
object
occupation
plastic
professional
protect
protection
protective
safe
safety
simple
site
solid
tool
toughness
wear
white
work
work wear
worker
yellow