Related Clues:

• Solid, firm
• House and stable
• In farm, I must replace a stable
• Business unlikely to collapse
• Solid; difficult
• Stable; business
• Unhealthy-looking food?
• Solid; tough
• Far from tender vegetable's not cold
• Stable; company
• After being knocked over, Mister Short's condition is stable
• Organization having a solid structure
• Company established by female in Rome, oddly
• Hard wood with facing of metal
• Writer, not an unknown, is impenetrable