fortress /förˈtrəs or fōrˈ/

1. A fortified place
2. A defence

To guard

• fieldstone
• fieldstones
• field strength
• field strengths
• field test
• field-test
• field-tested
• field-testing
• field tests
• field-tests
• field train
• field trial
• field trials
• field trip
• field trips
• fieldvole
• fieldward
• fieldwards
• fieldwork
• fieldworker
• fieldworkers
• fieldworks
• fiend
• fiendish
• fiendishly