arc
bright
construct
construction
constructor
craftsman
cut
employee
employment
equipment
freight
grunge
hard
hot
industrial
industry
install
iron
job
labor
maintain
maintenance
mechanical
men
metal
metalwork
people
plodding
protection
rail
railroad
railway
repair
safety
shine
site
spark
station
steel
steelwork
torch
train
transportation
way
work
worker
workman