The stair rail is an important safety feature in any home or building where there are stairs. Also known as a handrail or banister, it provides support and stability when ascending or descending the stairs. There are several synonyms for the word "stair rail" including balustrade, railing, guardrail, and handgrip. Balustrade is a term used to describe a row of repeating balusters or vertical supports that are connected by a handrail. A railing is a vertical bar that supports a handrail and prevents accidents while climbing stairs. Guardrail refers to a protective barrier that is installed along the edge of stairs or a balcony to keep people from falling. Lastly, handgrip is a handle or rail that is used for support when ascending or descending a flight of stairs.