| linchpin | (noun) pin inserted through an axletree to hold a wheel on | Synonyms: lynchpin |
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| (noun) a central cohesive source of support and stability | Synonyms: anchor, backbone, keystone, lynchpin, mainstay |
| lynchpin | (noun) pin inserted through an axletree to hold a wheel on | Synonyms: linchpin |
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| (noun) a central cohesive source of support and stability | Synonyms: anchor, backbone, keystone, linchpin, mainstay |
| pushpin | (noun) a tack for attaching papers to a bulletin board or drawing board | Synonyms: drawing pin, thumbtack |
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