Related Clues:

• Like some stomachs
• Rigid
• More than strong
• Not subject to change
• Able to withstand great strain
• Skillet makeup
• Molded metal
• Cookware material
• Inflexible, as some rules
• Kind of stomach
• Skillet material
• Inflexible, as an agreement
• Unbreakable
• Like some stomachs or stoves
• Able to withstand anything