Like this site? Pledge support via Patreon!
Photo of a keystone
Attribution-Sharealike

Kis forKeystone

A keystone is the stone at the top center of an arch. It holds all the other stones in place, which is why it is called the keystone. Keystones are often decorated quite elaborately.

Keystone rhymes with ...

Mown, Homegrown, Limestone, Bone, Drone ... see all