1
plucky
1
powerful
1
principled
1
reckless
1
solid
1
spirited
1
spunky
1
strong-willed(adjective, weak, determined)
1
stronghearted
1
undaunted
1
unrelenting
1
vertebrate
1
vigorous
0
adventurous
0
almighty
0
athletic
0
backboned
0
barefaced
0
bloody
0
boney
11 years ago|1.8k views|share |citing 
APASmart Define. (2015). spineless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/spineless/thesaurus/antonyms
ChicagoSmart Define. 2015. "spineless thesaurus" https://smartdefine.org/spineless/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, spineless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/spineless/thesaurus/antonyms>.
MLASmart Define. "spineless thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/spineless/thesaurus/antonyms>