What is another word for keystone?

Need synonyms for keystone? Here's a list of similar words from our thesaurus that you can use instead.

The central principle or part of a policy, system, etc., on which all else depends
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“They had begun to realize that, should the king abscond, the keystone of the whole constitution would be lost, with incalculable consequences.”
A central stone at the summit of an arch, locking the whole together
“With a thickness of 12 inches, the arch features a decorative keystone and double corbels, outlined by antique glazing on a white lacquer base.”
The threads in a woven fabric, composed of the warp (threads running lengthwise) and woof (threads running crosswise) to create the texture of the fabric
The basic or fundamental parts that support or allow for the rest
A slab of stone set up at the head of a grave, typically inscribed with the name of the dead person
The second step in the baseball diamond
A principle within a particular sphere of knowledge
An object or piece of something shaped like a wedge
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