backbones
back-bones
noun
Individuals or things providing essential strength and support to an organisation or community.
"The dedicated staff are the backbones of the company."
noun
The series of vertebrae forming the main support structure of a vertebrate's body.
"Many animals possess flexible backbones."
Thesaurus
Synonyms: backbone, spine, vertebral column, rachis, spinal column, back, anchor, mainstay, keystone, linchpin, lynchpin, moxie