abc
aged
alphabet
background
brown
clock
construct
dark
design
detail
dirty
element
figure
font
gear
grunge
grungy
industrial
industry
iron
isolated
letter
mechanical
mechanism
metal
metallic
old
plate
punk
repair
retro
rust
rusty
scratch
screw
shiny
sign
steam
steampunk
symbol
text
texture
tool
type
typewriter
vintage
work
yellow