adder
architect
architecture
background
blueprint
building
business
color
communication
concept
construction
contractor
design
employment
engineer
engineering
equipment
factory
fence
gloves
hard
hardhat
hat
head
headgear
health
healthy
helmet
helmets
industrial
industry
inspection
job
maintenance
plastic
prevent
prevention
project
protect
protection
protective
safe
safety
security
steel
structure
tool
water level
white
work
worker
workman
workplace
yellow