Synonyms|330Antonyms|5|Broader|3Narrower|0Related|149

33 entries under stiff topic. ×

9
firm(adjective, set, hard, usual, regular)
8
inflexible(adjective, set, hard, severe, harsh)
7
unalterable(adjective, set, hard, fixed)
5
invariable(adjective, set, hard, inflexible)
3
set(adjective, hard, severe, usual)
3
strict(adjective, set, hard, severe, harsh)
2
dead set on(expression, adjective, idiom, severe, energetic)
2
fixed(adjective, set, hard, firm, determined)
2
immovable(adjective, set, hard, cruel, usual)
1
acrimonious(adjective, severe, harsh, rigid)
1
binding(adjective, severe, harsh, rigid)
1
brick-wall(adjective, severe, rigid, tight)
1
by the book(expression, adjective, idiom, severe, harsh)
1
by the numbers(expression, adjective, idiom, severe, harsh)
1
compelling(adjective, severe, harsh, rigid)
1
confining(adjective, severe, harsh, rigid)
1
convincing(adjective, severe, harsh, certain)
1
demanding(adjective, severe, harsh, rigid)
1
determined(adjective, set, hard, firm, usual)
1
drawing(adjective, severe, harsh, rigid)
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ChicagoSmart Define. 2015. "ironclad thesaurus" https://smartdefine.org/ironclad/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, ironclad thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/ironclad/thesaurus/synonyms>.
MLASmart Define. "ironclad thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/ironclad/thesaurus/synonyms>