词路径
- entity
- physical entity
- object
- physical object
- whole
- unit
- artifact
- artefact
- structure
- construction
- defensive structure
- defense
- defence
- stronghold
- fastness
上位词
- defence
- defense
- defensive structure
下位词
- bastion
- blockhouse
- citadel
- donjon
- dungeon
- hold
- keep
- redoubt