fortress /förˈtrəs or fōrˈ/

1. A fortified place
2. A defence

To guard

• upgather
• upgathered
• upgathering
• upgathers
• upgaze
• upgazed
• upgazes
• upgazing
• upgo
• upgoes
• upgoing
• upgone
• upgradabilities
• upgradability
• upgradable
• upgradation
• upgradations
• upgrade
• upgradeabilities
• upgradeability
• upgradeable
• upgraded
• upgrader
• upgraders
• upgrades