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Synonyms of keystone

Noun


1. anchor, mainstay, keystone, backbone, linchpin, lynchpin, support

usage: a central cohesive source of support and stability; "faith is his anchor"; "the keystone of campaign reform was the ban on soft money"; "he is the linchpin of this firm"

2. keystone, key, headstone, building block

usage: the central building block at the top of an arch or vault

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See also: keystone (Dictionary)