1. (noun) anchor, mainstay, keystone, backbone, linchpin, lynchpin
a central cohesive source of support and stability
Synonyms: anchorman, key, linchpin, ground tackle, lynchpin, rachis, headstone, grit, sand, anchorperson, spinal column, keystone, guts, back, backbone, pillar, spine, anchor, mainstay, moxie, gumption, vertebral column
2. (noun) backbone, grit, guts, moxie, sand, gumption
fortitude and determination
Synonyms: mainstay, good sense, lynchpin, grit, mother wit, spine, sand, gritrock, horse sense, gritstone, spinal column, keystone, common sense, linchpin, back, backbone, gumption, anchor, rachis, moxie, guts, vertebral column, sense
3. (noun) spinal column, vertebral column, spine, backbone, back, rachis
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
Synonyms: dorsum, cover, sticker, spikelet, mainstay, backrest, lynchpin, binding, grit, prickle, book binding, pricker, spine, sand, thorn, spinal column, keystone, spur, linchpin, back, backbone, rear, acantha, gumption, anchor, rachis, moxie, guts, vertebral column
4. (noun) spine, backbone
the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved
Synonyms: sticker, spikelet, mainstay, lynchpin, spine, prickle, pricker, grit, sand, thorn, spinal column, keystone, spur, linchpin, back, backbone, acantha, gumption, anchor, rachis, moxie, guts, vertebral column
5. (noun) backbone
the part of a network that connects other networks together
Synonyms: gumption, back, moxie, grit, spinal column, guts, sand, lynchpin, spine, linchpin, vertebral column, anchor, keystone, mainstay, rachis
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Synonyms for backbone 
