fortress /förˈtrəs or fōrˈ/

1. A fortified place
2. A defence

To guard

• treillage
• treillaged
• treillages
• treille
• treilles
• trek
• trekked
• trekker
• Trekker
• trekkers
• Trekkers
• Trekkie
• Trekkies
• trekking
• trek-ox
• trek-oxen
• treks
• trekschuit
• trekschuits
• trellis
• trellised
• trellises
• trellising
• trellis window
• trellis windows