46 entries under tough topic. ×

21
inflexible(adjective, hard, firm, solid)
19
unyielding(adjective, hard, firm, solid)
18
rigid(adjective, hard, severe, firm)
15
stiff(adjective, hard, firm, solid)
13
firm(noun, adjective, hard, solid)
12
uncompromising(adjective, firm, determined, distant)
10
hard(adjective, severe, firm, harsh)
8
resolute(adjective, firm, determined, distant)
6
inexorable(adjective, firm, determined, stiff)
5
crisp(adjective, hard, firm, stiff)
4
intractable(adjective, firm, fixed, distant)
4
set(adjective, hard, severe, firm)
4
solid(adjective, hard, severe, firm)
3
set in stone(expression, adjective, idiom, severe)
3
standing pat(expression, adjective, firm, determined)
3
unswayable(adjective, firm, determined, distant)
2
compressed(adjective, hard, solid, rigid)
2
concentrated(adjective, hard, solid, rigid)
2
condensed(adjective, hard, solid, rigid)
2
incompliant(adjective, hard, severe, firm)
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APASmart Define. (2015). inelastic thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/inelastic/thesaurus/synonyms
ChicagoSmart Define. 2015. "inelastic thesaurus" https://smartdefine.org/inelastic/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, inelastic thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/inelastic/thesaurus/synonyms>.
MLASmart Define. "inelastic thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/inelastic/thesaurus/synonyms>