die crack - A split in the die where there is no loss of metal. Shows as a raised irregular line - like lightning - on the coin.
die chip - A small piece missing from the die. looks like a glob or hump of metal with sharp edges on the coin.
die dent - a soft edged raised area - a hump - on a coin. Comes from something hitting the die.
die gouge - damage to the die usually caused by some sort of tool used to scrape something off the die. Sharp edged and usually straight.
die break - extensive die cracks with missing metal - evidence that a die is beginning to break apart.
broken die - complete breakage of the die - end to end crack, missing metal - a die falling apart.
cud - a piece missing off the edge of the die.