backbone Synonyms

spinal column vertebral column spine keystone mainstay back moxie linchpin anchor bedrock foundation strength cornerstone core rachis gumption sand grit guts lynchpin vertebra unifier vertebrae strengthener staple stroma upholder stent umbilicus trunnion toughness tenacity verso support valor sturdiness sustainer stoutness skeleton sinew sedulity sandiness root rhachis resolve resolution resoluteness spinal foundation stone spirit