Coin scratches are incuse on the coin and the trench is flat with squared edges.
Struck through coins have an obvious start or stop (or both) on the coin. These also are incuse.
A die crack is raised and irregular in shape.
A die chip can be part of a crack or just an area that breaks away usually on the field areas next to a device, or in a die crack.
A die break is when part of the material from the die breaks away from the crack leaving a wider looking area on the crack.
An retained internal die break is when the crack decides to go in two different directions, and then meets again. Usually a single crack and then diverts part of the crack around an opposite side and connects back to the die crack.
A rim
Cud involves the area outside of the die and chips away on the step down on the die. These rise above the rim area as part of the ledge has broken off the die.
A
Die Cud is when part of the outside of the die has broken away from the edge of the die and affects the rim rising above the rim and on the die as well.
A new thread I created on this subject:
http://goccf.com/t/340793