Does 'railings' and 'banister' mean the same thing? Do they both mean 'the row of poles at the side of stairs and the wooden or metal bar on top of them, that stops you from falling over the edge of stairs.
banister = • noun1 (also banisters) the uprights and handrail at the side of a staircase
railing(s) = • noun a fence or barrier made of rails
It's interesting to note that railings are predominantly vertical, while the handrail in banisters is diagonal - the uprights are called 'spindles', except for the thick ones at the top and bottom and between flights, which are called 'newel posts'.