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

• Tu.
• tuan
• Tuanku
• tuans
• Tuareg
• tuart
• tuarts
• tuatara
• tuataras
• tuath
• tuaths
• tub
• tuba
• tubae
• tubage
• tubages
• tubal
• tubal ligation
• tubal ligations
• tubar
• tubas
• tubate
• tubbable
• tubbed
• tubber