bonanza /bə-nanˈzə or bəʊ- or bo-/

1. A rich mine or vein of precious ore (N American)
2. A large amount of (usu) silver
3. Any source of wealth or stroke of luck

Very prosperous

• boneheads
• bone-idle
• bone-lace
• boneless
• bone marrow
• bone marrow grafting
• bone marrows
• bone meal
• bone-mill
• bone-mills
• bone of contention
• bone-oil
• boner
• boners
• brainstorming
• brainstormings
• brainstorms
• brains trust
• brains trusts
• brainteaser
• brainteasers
• brainwash
• brainwashed
• brainwashes
• brainwashing