| 100% | HATH | 4 | Verb in the world's first telegraph message |
| 71% | HATH | 4 | Verb in the first telegraph message |
| 53% | NIHAO | 5 | "Hello," in the world's most common first language |
| 52% | ART | 3 | First verb in the Lord's Prayer |
| 51% | YELLOWSTONE | 11 | The world's first national park, located in Wyoming, Montana, and Idaho |
| 51% | FUN | 3 | First Across word in the world's first crossword |
| 50% | FUN | 3 | First word across in the world's first crossword (1913) |
| 50% | BOSTON | 6 | Site of the world's first city marathon in 1897 |
| 48% | LOUISE | 6 | __ Brown, the world's first IVF baby, born in 1978 |
| 48% | TULIP | 5 | Flower that caused the world's first economic bubble in the 1630s |
| 45% | HATH | 4 | Word in the first Morse message |
| 45% | PITTSBURGHPIRATES | 17 | Loser in the first World Series, 1903 |
| 44% | SOVIET | 6 | The first S in USSR |
| 44% | SPUTNIK | 7 | The world's first constructed satellite |
| 44% | SERVICE | 7 | The second S in SMS messaging |
| 44% | NINE | 4 | Cost in dollars of the world's first TV ad in 1941 |
| 43% | FINLAND | 7 | First country in the world with universal suffrage (1906) |
| 43% | HAITI | 5 | The world's first Black-led republic |
| 43% | SELF | 4 | The first "S" in S.A.S.E. |
| 43% | SOV | 3 | The first "S" in S.S.R.: Abbr. |
| 43% | HADRON | 6 | Subatomic particle in the world's largest collider |
| 42% | ISP | 3 | "The World" in Mass. was the first commercial one, in '89 |
| 41% | ALI | 3 | Sports Illustrated's Sportsman of the Year in 1974 (10 years after he first became world champion) |
| 41% | MINARET | 7 | The world's oldest one is in Tunisia |
| 41% | EVEREST | 7 | The world's highest mountain located in Nepal |
| 41% | SOVIET | 6 | What the first S in USSR stood for |
| 41% | SOVIET | 6 | What the first S stood for in USSR |
| 41% | WILMA | 5 | Considered the world's fastest woman in the 60s, she became the first American woman to win three golds in a single Olympic Games |
| 41% | URUGUAY | 7 | Country hosting the first FIFA World Cup in 1930 |
| 41% | URUGUAY | 7 | Country that won the first World Cup in Soccer |