13
stiff(adjective, hard, rigid, inflexible)
12
stubborn(adjective, hard, weak, soft, rigid)
8
rigid(adjective, hard, soft, severe, gentle)
6
firm
6
obstinate(adjective, hard, rigid)
5
harsh(adjective, calm, soft, low)
5
obdurate
4
inflexible(adjective, hard, soft, stiff, rigid)
3
unyielding(adjective, hard, weak, rigid, flexible)
3
strong
3
unformed
2
tough
2
unalterable
2
unbendable(adjective, hard, rigid, velvety, rubberlike)
1
adamant
1
adamantine
1
kick-ass
1
unbending
1
unchangeable
1
uncompromising
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APASmart Define. (2016). pliable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/pliable/thesaurus/antonyms
ChicagoSmart Define. 2016. "pliable thesaurus" https://smartdefine.org/pliable/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2016, pliable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/pliable/thesaurus/antonyms>.
MLASmart Define. "pliable thesaurus" 23 March 2016. Web. 21 September 2026. <https://smartdefine.org/pliable/thesaurus/antonyms>