1. (noun) an ornamental sunken panel in a ceiling or dome

• coffer
• lacuna

2. (noun) a chest to hold ammunition

• ammunition chest

3. (noun) large watertight chamber used for construction under water

• cofferdam
• pneumatic caisson

1. (noun) a two-wheeled military vehicle carrying artillery ammunition

• armed forces
• armed services
• military
• military machine
• war machine

1. (noun) an ornamental sunken panel in a ceiling or dome

• panel

2. (noun) a two-wheeled military vehicle carrying artillery ammunition

• military vehicle

3. (noun) a chest to hold ammunition

• chest

4. (noun) large watertight chamber used for construction under water

• chamber