On the sash, the keeper rail is the vertical part where the keeper is attached.

On the sash, the keeper stile is the horizontal part where the keep is attached.

On a door, a kickplate is a metal plate attached to one or two sides of a door's bottom to prevent denting and soiling of the door.

Krypton gas is an odorless and colorless gas that replaces air between two or more glass panes. Krypton is denser than air and works better to deter heat transfers.