fortress /förˈtrəs or fōrˈ/

1. A fortified place
2. A defence

To guard

• firebreaks
• firebrick
• firebricks
• fire brigade
• fire brigades
• fire bucket
• fire buckets
• firebug
• firebugs
• fire clay
• fire control
• fire controls
• firecracker
• firecrackers
• firecrest
• fire-crested wren
• fire-crested wrens
• firecrests
• fired
• fire damp
• firedamp
• firedamps
• fire department
• fire departments
• firedog