• sandboxx,
• aandboxes,
• zandboxes,
• xandboxes,
• dandboxes,
• eandboxes,
• wandboxes,
• szndboxes,
• ssndboxes,
• swndboxes,
• sqndboxes,
• sabdboxes,
• sandboxesx,
• sanboxes,
• sandoxes,
• wndboxes,
• Sanddabes,
• Sandtabes,
• weyndboren,
• Sandboks

• sandblast,
• sandbox,
• sand dab,
• sandberry,
• Sandberg,
• sandbar,
• sandbag,
• sandbur,
• sandboy,
• sandblaster.

The adjective form of the word "sandboxes" is "sandbox".