abstract
architecture
background
bar
batch
building
bundle
concrete
construct
construction
corroded
corrosion
corrosive
decay
ferro
gray
group
industrial
industry
iron
lines
material
metal
new
nobody
parallel
pattern
pile
pole
power
rail
rebar
reinforce
reinforced
reinforcement
reinforcing
rigid
rod
round
rust
rusty
shiny
steel
strenghten
strong
structure
texture
tie
together
truck