| 100% | PHD | 3 | Woodrow Wilson was the only president with this degree: Abbr. |
| 59% | PHD | 3 | Wilson was the only president with one |
| 56% | PHD | 3 | Woodrow Wilson was the only U.S. president to have one |
| 56% | PHD | 3 | Woodrow Wilson is the only U.S. president to have one |
| 47% | PHD | 3 | Woodrow Wilson was the only U.S. prez to have one |
| 43% | MBA | 3 | Pres. George W. Bush was the only president to hold one of these degs. |
| 41% | SEP | 3 | Wm. H. Taft was the only U.S. president born in this month |
| 41% | ETAL | 4 | The AMA uses this abbr. with no period and if there are more than six authors, but only lists three of them in any case |
| 39% | PHD | 3 | Advanced degree held by only one US president, Woodrow Wilson: Abbr. |
| 38% | IOWA | 4 | Hoover was the only president born there |
| 37% | MBA | 3 | CFO's degree, maybe (Bush is the only president to have one) |
| 37% | MBA | 3 | G.W. Bush is the only president who earned one |
| 35% | STATE | 5 | Washington is the only one named for a president |
| 35% | TEE | 3 | August is the only month that ends with one |
| 35% | PATENT | 6 | Lincoln is the only U.S. president to have one |
| 34% | MBA | 3 | Degree that Ina Garten, host of the "Barefoot Contessa", is cooking with (abbr.) |
| 34% | MBA | 3 | Bush Jr. is the only U.S. president to hold one |
| 34% | SHULA | 5 | Don who is the only NFL coach with a perfect season |
| 34% | MOTTO | 5 | Montana is the only U.S. state with one in Spanish |
| 34% | CLEVELAND | 9 | Only president to be married in the White House |
| 34% | ETHANE | 6 | The only hydrocarbon simpler than this one is methane |
| 34% | LAMP | 4 | Florence Nightingale was the lady with this |
| 34% | LIN | 3 | Jeremy who is the only Taiwanese American with an NBA championship title |
| 33% | BEARD | 5 | Benjamin Harrison was the last president with one |
| 33% | EAR | 3 | A mantis is the only animal known to have just one of these |
| 33% | MINI | 4 | This one was made with "I" as the only vowel |
| 33% | AMI | 3 | "___ the only one who thinks this is a bad idea?" |
| 33% | AMI | 3 | "___ the only one who thinks this is funny?" (2 wds.) |
| 33% | FDR | 3 | US president with the longest time in office: Abbr. |
| 33% | LABORUNION | 10 | Ronald Reagan is the only U.S. president who was also president of a … |