| 100% | PERMIAN | 7 | Last period of the Palaeozoic era in the geological timescale |
| 88% | PERMIAN | 7 | Last period of the Palaeozoic era in the geological time scale |
| 51% | DEVONIAN | 8 | Fourth period of the Palaeozoic era of geologic time |
| 51% | ORDOVICIAN | 10 | Second period of the Palaeozoic era of geologic time |
| 51% | EOCENE | 6 | Second epoch of the Palaeogene period in the geologic timescale |
| 47% | PLEISTOCENE | 11 | First epoch of the Quaternary period in geological time |
| 43% | TERTIARY | 8 | Period of the Cenozoic Era |
| 43% | NEOGENE | 7 | Period of the Cenozoic Era |
| 43% | SILURIAN | 8 | Geologic period between the Ordovician and Devonian periods of the Palaeozoic era |
| 43% | ARA | 3 | The Era of ___ (famous period in Notre Dame football history) |
| 43% | MGM | 3 | Last holdout of the silent era |
| 43% | NEOLITHIC | 9 | Latest period of the Stone Age |
| 42% | TRIASSIC | 8 | The first period of the Mesozoic Era |
| 42% | TRIASSIC | 8 | First period of the Mesozoic Era |
| 42% | FINALSWEEK | 10 | Period for taking exams ... or a hint to the pattern shown in the last three or four letters of the asterisked answers |
| 41% | ZEE | 3 | Last letter of the alphabet, in the U.S. |
| 41% | SKYWALKER | 9 | Last name of the main character in Star Wars |
| 41% | ZED | 3 | Last letter of the alphabet, in London |
| 41% | ZED | 3 | Last letter of the alphabet, in England |
| 41% | ZED | 3 | Last letter of the alphabet, in Canada |
| 41% | FRI | 3 | Last day of the working week, in short |
| 41% | PLIOCENE | 8 | Last epoch of the Tertiary period |
| 41% | NEOGENE | 7 | Latter part of the Tertiary period |
| 40% | TRIASSIC | 8 | Geological time period of the first dinosaurs |
| 40% | ROY | 3 | Last name of the family in "Succession" |
| 40% | GIBB | 4 | Last name of the brothers in 33a |
| 40% | STINT | 5 | Period of service, as in the Army |
| 40% | PARR | 4 | Last name of the family in "Incredibles 2" |
| 39% | PROTEROZOIC | 11 | Geological aeon constituting the later part of the Precambrian |
| 39% | PROTEROZOIC | 11 | Geological aeon; the later part of the Precambrian aeon |