Related Clues:

• Sour
• Spoil
• Congeal
• Coagulate
• Turn
• Go bad, in a way
• Go sour
• Become lumpy
• Get lumpy
• Turn, in a way
• Turn sour
• Go bad, as milk
• Of milk, turn thick and soft when sour
• Of milk, turn sour
• Make blood do this to fill with horror