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

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

• unbraced
• unbraid
• unbrainwashed
• unbranched
• unbranching
• unbranded
• unbreakable
• unbreakableness
• unbridgeable
• unbridle
• unbridled
• unbroken
• unbrushed
• unbuckle
• unbundle
• unburden
• unburdened
• unburied
• unburned
• unburnished
• unburnt
• unbutton
• unbuttoned
• uncalled-for
• uncamphorated