backbone Synonyms

spine vertebral column spinal column moxie lynchpin mainstay keystone linchpin gumption grit sand back rachis anchor guts stiffener stent stoutness strength strengthener stroma sturdiness sandiness sustainer tenacity toughness trunnion quiddity umbilicus unifier steerer spirit sedulity sinew skeleton spinal rhachis resolve resolution sprit spunk stableness resoluteness resignment stamina starch staunchness steadfastness upholder rallying point