胃壁[iheki] stomach lining
外壁[gaiheki] outer wall
隔壁[kakuheki] barrier wall
岸壁[ganpeki] wharf
胸壁[kyouheki] chest walls

合壁[gappeki] neighbor with just a wall between
磁壁[jiheki] magnetic domain
障壁[shouheki] enclosing wall
城壁[jouheki] rampart
絶壁[zeppeki] precipice

エンジン故障[enjinkoshou] engine failure
安全保障[anzenhoshou] security guarantee (e.g. military security, network security, etc.)
安全保障条約[anzenhoshoujouyaku] US-Japan Security Treaty
画障[gashou] pictured paper doors
気に障る[kinisawaru] to hurt one's feelings

気障[kiza] affected
血行障害[kekkoushougai] disturbance (blockage) of blood flow
故障[koshou] break-down
黒内障[kokunaishou] black cataract
差し障り[sashisawari] offence