1) Armored 2) Incontestable 3) Incontestible 4) Mantelet 1) Incontestable 2) Incontestible 3) Ironclad 4) Like police vests 5) Lined with Kevlar 6) Make bulletproof 7) Not penetrable by bullets 8) Safe from failure 9) To make proof against bullets 10) To make resistant to failure 11) Unassailable 12) Unshakable 13) Watertight 14) Without flaws or loopholes 
[Iyaz song] This picture was taken by my friend Beth Henry in 2010 for my personal and business purposes. ...
[adj] - not penetrable by bullets
Hard, compacted snow and ice that requires serious edging and is often caused by thaw-freeze cycle or rain falling on slopes. See also boilerplate and hardpack.
adjective not penetrable by bullets; `bulletproof glass`; `bulletproof vest`
(of vehicles, glass, clothing, etc.) capable of resisting or absorbing the impact of a bullet. · safe from failure; without errors or shortcomings and beyond criticism: a bulletproof system; a bulletproof budget.