battlements — The battlements of a castle or fortress consist of a wall built round the top, with gaps through which guns or arrows can be fired.
ramparts — Fortification. a broad elevation or mound of earth raised as a fortification around a place and usually capped with a stone or earth parapet. such an elevation together with the parapet.
lines — a thickness of glue, as between two veneers in a sheet of plywood.
resistance — the act or power of resisting, opposing, or withstanding.
immunity — the state of being immune from or insusceptible to a particular disease or the like.
protection — the act of protecting or the state of being protected; preservation from injury or harm.
shield — a broad piece of armor, varying widely in form and size, carried apart from the body, usually on the left arm, as a defense against swords, lances, arrows, etc.
safeguard — something that serves as a protection or defense or that ensures safety.
resilience — the power or ability to return to the original form, position, etc., after being bent, compressed, or stretched; elasticity.
