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3 entries under idiom topic. ×

1
all sewn up(noun, expression, trust, confidence)
0
open and shut case(noun, expression, trust, confidence)
0
rain or shine(noun, expression, trust, confidence)
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APASmart Define. (1970). cast-iron certainty thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/cast-iron_certainty/thesaurus/synonyms
ChicagoSmart Define. 1970. "cast-iron certainty thesaurus" https://smartdefine.org/cast-iron_certainty/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 1970, cast-iron certainty thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/cast-iron_certainty/thesaurus/synonyms>.
MLASmart Define. "cast-iron certainty thesaurus" 1 January 1970. Web. 29 September 2026. <https://smartdefine.org/cast-iron_certainty/thesaurus/synonyms>