(n.) One who, or that which, gives or adds strength.

advocate alpenstock arm athletic supporter back backbone backing bandeau bearer bra brace bracer bracket brassiere buttress cane carrier cervix corset crook crutch foundation garment fulcrum girdle guy guywire jock jockstrap mainstay maintainer mast neck prop reinforce reinforcement reinforcer rest resting place rigging shoulder shroud spine sprit staff standing rigging stave stay stick stiffener support supporter sustainer upholder walking stick