| 100% | ONT | 3 | It shares a 1,650+ mile border with the U.S.: Abbr. |
| 60% | ALASKA | 6 | It shares a 1,538-mile border with Canada |
| 48% | IDAHO | 5 | It shares a 45-mile border with Canada |
| 48% | IDAHO | 5 | It shares a 45-mile border with British Columbia |
| 48% | ARMENIA | 7 | It shares a 27-mile border with 27-Across |
| 47% | CANADA | 6 | Country whose border with the U.S. is more than five thousand miles long |
| 45% | ALSACE | 6 | It shares a border with Switzerland |
| 45% | CHECHNYA | 8 | It shares a border with Georgia |
| 45% | IDA | 3 | It shares a small border with BC |
| 45% | KOSOVO | 6 | It shares a border with North Macedonia |
| 45% | QUESTIONMARK | 12 | It shares a key with the slash |
| 44% | GEORGIA | 7 | U.S. state that shares its name with a country |
| 44% | OHIO | 4 | It shares a long border with Lake Erie |
| 44% | ONE | 3 | It shares a key with the exclamation point |
| 44% | TWO | 3 | It shares a key with the at sign |
| 43% | MAINE | 5 | Only state to share a border with only one other U.S. state |
| 41% | ARG | 3 | Country sharing a long border with Chile: Abbr. |
| 40% | SDAK | 4 | Only U.S. state in which the name of the state and its capital share no letters: Abbr. |
| 39% | APPLE | 5 | Tech company that shares a name with the fruit in its logo |
| 39% | NATO | 4 | Post-WWII military alliance with the U.S. and U.K.: Abbr. |
| 39% | WWI | 3 | The U.S. joined it in 1917: Abbr. |
| 39% | STE | 3 | Sault ___ Marie, city in Canada's Ontario that shares its name with a city in the USA |
| 39% | UTEP | 4 | Sch. with a view across the U.S.-Mexican border |
| 39% | USSR | 4 | It once shared a land border with 16 countries |
| 39% | EDT | 3 | The U.S. Open is played on it: Abbr. |
| 38% | ALA | 3 | State that shares its name with a country music group: Abbr. |
| 38% | IRIS | 4 | Flower that shares its name with a part of the eye |
| 38% | SATURN | 6 | Planet that shares its namesake with a day of the week |
| 38% | IRIS | 4 | Part of the eye that shares its name with a flower |