Here's a list: take your pick. (I can't believe I chased this up).
1 Broken or Cracked Castings
2 Crushes, Pushups & Clamp-Offs
3 Cuts or Washes
4 Dirt, Slag & Other Inclusions
5 Drops
6 Erosion Scabs
7 Expansion Defects
8 Gas Defects
9 Gross Segregation, Carbon Flotation, Kish Graphite & Dross
10 Non-Uniform Hardness, Hard Spots, Hard Areas & Chilled Spots
11 Hot Tears
12 Inverse Chills
13 Mass Hardness
14 Metal Penetration & Fusion
15 Misruns & Cold Shuts
16 Off Dimension Related to Cores
17 Open Grain Structure
18 Poured Short
19 Ramoffs or Ramaways
20 Rough Surface
21 Runouts & Bleeders
22 Scars, Seams & Plates
23 Shifts
24 Shot Metal or Cold Shots
25 Shrinkage Cavities & Depressions
26 Stickers
27 Swells, Strains & Sags
28 Veins & Fins
29 Warped Castings
30 Widmanstattën Graphite