Related by context. Frequent words. (Click for all words.) 41 bulletproof glass 41 bulletproof 41 impregnable 40 watertight 40 bullet proof 38 enclosure 36 airtight 35 weatherproof 35 sturdy 34 invulnerable 34 reinforced concrete 34 indestructible 34 fortress 33 snug 33 sturdier 33 fenced 33 fortified 33 soundproof 32 withstand 32 wire mesh 32 structurally sound 32 guarded 32 fences 32 foolproof 31 armored 31 fireproof 31 igloo 31 waterproof 31 hermetically sealed 31 outer shell 31 paddock 31 insulated 31 sandbagged 31 impervious 30 enclosures 30 Green Zone 30 fitted 30 specially constructed 29 underground bunkers 29 impenetrable 29 lockable 29 enclosed 29 palatial 29 armor 29 Plexiglas 29 ringed 29 creaking 29 fortifications 29 heavily guarded 28 fool proof 28 kitted 28 sunroof 28 insulates 28 built 28 drafty 28 safe 28 structural integrity 28 retractable roof 27 heavily fortified 27 encased 27 insulation 27 inch thick 27 equipped 27 protected 27 kennels 27 reinforced 27 shielded 27 polycarbonate 27 neoprene 27 hulking 27 concrete barriers 27 retractable 27 tamper proof 27 observation deck 27 air ducts 26 crate 26 sheltered 26 moat 26 Kevlar 26 berms 26 robustness 26 encase 26 inside 26 stables 26 fortresses 26 infallible 26 shields 26 barbed wire 26 proofed 26 insulating 26 impermeable 26 fence 26 vents 26 gates 26 chauffeur driven 26 adaptable 26 plexiglass 26 iron clad 26 walls 26 removable 26 security