| 100% | CARTIER | 7 | Jacques —, French explorer who discovered the St Lawrence River, Canada |
| 80% | CARTIER | 7 | Jacques —, French explorer who discovered St Lawrence River, Canada |
| 48% | DESOTO | 6 | Hernando —, Spanish explorer who discovered the Mississippi River |
| 46% | STURT | 5 | Charles —, explorer who discovered the Darling River in Australia in 1829 |
| 40% | DESOTO | 6 | Spanish explorer who discovered the Mississippi |
| 39% | COUSTEAU | 8 | French Explorer Jacques, who is known to be the inventor of the Aqua-lung and pioneer of marine conservation |
| 38% | THOUSAND | 8 | The St. Lawrence River's misnamed ___ Islands |
| 37% | ENE | 3 | General dir. of the St. Lawrence River |
| 37% | OTTAWA | 6 | Chief tributary of the St. Lawrence River |
| 37% | ONT | 3 | It's on the St. Lawrence River: Abbr. |
| 36% | MOISIE | 6 | River in Quebec, Canada, that flows into the St Lawrence River near Sept-Iles |
| 35% | KINGCHARLE6 | 11 | French monarch who ordered the St. Bartholomew's Day Massacre, 1572 |
| 35% | OTTAUUA | 7 | River to the St. Lawrence |
| 35% | OTTAWA | 6 | River to the St. Lawrence |
| 34% | CABOT | 5 | Explorer who laid the groundwork for the British claim to Canada |
| 34% | HENRYHUDSON | 11 | English explorer who discovered a large Canadian bay in the early 1600s: 2 wds. |
| 33% | SAINTMAURICE | 12 | River rising in Quebec, Canada, that flows to the St Lawrence at Trois-Rivieres |
| 33% | GASPE | 5 | — Peninsula, area of land in E Canada between the St Lawrence River and Chaleur Bay |
| 31% | CARTIER | 7 | St Lawrence River discoverer |
| 31% | CADILLAC | 8 | French explorer who founded Detroit |
| 31% | NOONE | 5 | Who discovers the perfect crime |
| 30% | THOUSANDISLANDS | 15 | Chain in the upper St. Lawrence River |
| 29% | ERIK | 4 | Redhaired Viking explorer who discovered Greenland |
| 29% | CHADWICK | 8 | James __; physicist who discovered the neutron |
| 29% | CHADWICK | 8 | Physicist James, who discovered the neutron |
| 29% | ALVAREZ | 7 | Physicist who discovered the iridium layer |
| 29% | OATES | 5 | Lawrence —, explorer who died on the second Antarctic expedition of R F Scott |
| 29% | GEIGER | 6 | German physicist who discovered the atomic nucleus |
| 29% | THOMSON | 7 | Scientist who discovered the electron, J.J. __ |
| 29% | JENNER | 6 | Scientist who discovered the vaccine for smallpox |