1. Covered with heavy steel
   - armor-clad [US], armor-plated [US], armour-plated [Brit, Cdn], steel-plated

See also: armored [US], armoured [Brit, Cdn]

• atomic number 98
• atomic number 99
• atomic physics
• atomic pile
• atomic power
• atomic reactor
• atomic spectrum
• atomic theory
• atomic warhead
• atomic weapon
• atomic weight
• atomically
• atomicity
• atomisation
• atomise
• atomiser
• atomism
• atomist
• atomist theory
• atomistic
• atomistic theory
• atomistical
• atomization
• atomize
• atomizer