| OHI | a midwestern state in north central United States in the Great Lakes region |
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| OHI | a river that is formed in western Pennsylvania and flows westward to become a tributary of the Mississippi River |
| OHI | a buckeye with scaly gray bark that is found in the central United States |
| OHI | a variety of goldenrod |
| OHI | a river that is formed in western Pennsylvania and flows westward to become a tributary of the Mississippi River |
| OHI | a resident of Ohio |