4
bone(noun, back, backbone)
4
chine(noun, back, point, range, fold)
4
guts(noun, drive, strength, energy, resolve)
4
mainstay(noun, support, prop, backbone)
4
projection(noun, bulge, overhang)
4
spear(noun, needle)
4
spicule
4
spiculum(sharpness, spike)
4
spikelet
4
pluck(noun, drive, strength, energy, resolve)
3
book
3
bramble
3
brier
3
linchpin(noun, support, prop, backbone)
3
moxie(noun, strength, resolve, determination, firmness)
3
nerve(noun, drive, strength, energy, resolve)
3
sand(noun, resolve, courage, nerve, boldness)
3
support(foundation, prop, backbone)
3
thistle
3
tine(noun, top, point, head, spur)
11 years ago|8.1k views|share |citing 
APASmart Define. (2015). spine thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/spine/thesaurus/synonyms
ChicagoSmart Define. 2015. "spine thesaurus" https://smartdefine.org/spine/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, spine thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/spine/thesaurus/synonyms>.
MLASmart Define. "spine thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/spine/thesaurus/synonyms>