BIG SIOUX RIVERBig Sioux River · English · Reference checkedReferenceOpen English WordNet 2024oewn2024:lemma:BIG SIOUX RIVERTier 1Ordinal178Pythagorean79Classical168Reverse173Reverse Reduction83Standard673Final Large673Ordinal142Reduced43Atbash886Isopsephy972Ordinal153Abjad668