| 100% | SOMNOLOGY | 9 | Proper name for the science of sleep |
| 55% | URSI | 4 | Abbreviation for the French name of the International Union of Radio Science |
| 54% | URSAMINOR | 9 | Proper name for the Little Bear constellation |
| 52% | ASTRO | 5 | Prefix for the science of 4-Across |
| 51% | ACETYL | 6 | First six letters of the proper name for aspirin |
| 50% | MUAYTHAI | 8 | Proper name for Thailand's form of kickboxing |
| 50% | REDARMY | 7 | Name for the armed forces of the USSR |
| 50% | HOGLET | 6 | Name for the young of prickly garden mammal |
| 50% | ASCORBIC | 8 | A type of acid, the proper name for vitamin C |
| 49% | AMBIEN | 6 | Brand name for the sleep aid zolpidem |
| 49% | ABYSSINIA | 9 | Another name for the former empire of Ethiopia |
| 49% | CANTON | 6 | Former name for the Chinese city of Guangzhou |
| 49% | JUTLAND | 7 | English name for the Danish area of Jylland |
| 49% | MAMUCIUM | 8 | Roman name for the modern city of Manchester |
| 49% | SCOTIA | 6 | Classic name for the land north of England |
| 49% | LITHOLOGY | 9 | Scientific name for the macroscopic study of rocks |
| 49% | MARCH | 5 | Month named for the Roman god of war |
| 49% | MARS | 4 | Planet named for the Roman god of war |
| 49% | WEBB | 4 | Telescope named for the second administrator of NASA |
| 48% | LUTHIER | 7 | Proper name for a maker of guitars and lutes |
| 48% | OUGHTS | 6 | Possible name for the first decade of the century |
| 48% | RIDINGS | 7 | The name for the division of Yorkshire into thirds |
| 48% | ZAIRE | 5 | Former name for the Democratic Republic of the Congo |
| 48% | SEWELLEL | 8 | Another name for the mountain beaver of North America |
| 48% | JUSTIFIED | 9 | Alternative name for the KLF, __ Ancients of Mu Mu |
| 48% | IRIS | 4 | Flower named for the Greek goddess of the rainbow |
| 48% | CYYOUNG | 7 | Award named for the winningest pitcher of all time |
| 48% | ORIOLES | 7 | MLB team named for the state bird of Maryland |
| 48% | POMONA | 6 | California city named for the Roman goddess of fruit |
| 48% | YENSID | 6 | Proper name of the sorcerer in Fantasia |