87 entries under rigid topic. ×

3
tense(adjective, uneasy, bothered)
2
by the book(expression, adjective, idiom, strong, hard)
2
concrete(adjective, correct, solid, exact, proper)
2
grievous(adjective, hard, tough, severe, difficult)
2
iron-fisted(adjective, severe, firm, harsh, stiff)
2
ironclad(adjective, set, hard, severe, harsh)
2
moral(adjective, careful, straight, upright)
2
taut
2
valid(adjective, open, sound, correct, right)
1
aloof(tough, fair, pure, fixed)
1
binding(adjective, set, severe, harsh, stiff)
1
brick-wall(adjective, severe, stiff, tight)
1
by the numbers(expression, adjective, idiom, severe, harsh)
1
compelling(adjective, severe, harsh, stiff)
1
hard as nails(expression, adjective, idiom, tough, severe)
1
persnickety(harsh, careful, precise, tidy)
1
powerful(adjective, severe, harsh, stiff)
1
reserved(adjective, tough, firm, fixed, stiff)
1
trying(adjective, hard, tough, difficult, harsh)
1
unswayable(hard, tough, fixed, reserved)
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APASmart Define. (2015). strict thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/strict/thesaurus/synonyms
ChicagoSmart Define. 2015. "strict thesaurus" https://smartdefine.org/strict/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, strict thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/strict/thesaurus/synonyms>.
MLASmart Define. "strict thesaurus" 3 August 2015. Web. 25 September 2026. <https://smartdefine.org/strict/thesaurus/synonyms>