Noun

• S: (n) anchor, mainstay, keystone, backbone, linchpin, lynchpin (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"
• S: (n) backbone, grit, guts, moxie, sand, gumption (fortitude and determination) "he didn't have the guts to try it"
• S: (n) spinal column, vertebral column, spine, backbone, back, rachis (the series of vertebrae forming the axis of the skeleton and protecting the spinal cord) "the fall broke his back"
• direct hyponym / full hyponym
• part meronym
• direct hypernym / inherited hypernym / sister term
• S: (n) skeletal structure (any structure created by the skeleton of an organism)
• S: (n) rib cage (the bony enclosing wall of the chest)
• S: (n) arch (a curved bony structure supporting or enclosing organs (especially the inner sides of the feet))
• S: (n) heel (the back part of the human foot)
• S: (n) girdle (an encircling or ringlike structure)
• S: (n) column (any tubular or pillar-like supporting structure in the body)
• S: (n) appendicular skeleton (the part of the skeleton that includes the pectoral girdle and the pelvic girdle and the upper and lower limbs)
• S: (n) axial skeleton (the part of the skeleton that includes the skull and spinal column and sternum and ribs)
• S: (n) spinal column, vertebral column, spine, backbone, back, rachis (the series of vertebrae forming the axis of the skeleton and protecting the spinal cord) "the fall broke his back"
• S: (n) metacarpus (the part of the hand between the carpus and phalanges)
• S: (n) metatarsus (the skeleton of the human foot between the toes and the tarsus; the corresponding part of the foot in birds or of the hind foot in quadrupeds)
• S: (n) tarsus (the part of the foot of a vertebrate between the metatarsus and the leg; in human beings the bones of the ankle and heel collectively)
• part holonym
• derivationally related form
• S: (n) 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) "the title and author were printed on the spine of the book"
• direct hypernym / inherited hypernym / sister term
• part holonym
• S: (n) backbone (the part of a network that connects other networks together) "the backbone is the part of a communication network that carries the heaviest traffic"