| 100% | REEF | 4 | Ecosystem that rivals only the rainforest in biodiversity |
| 39% | DREAMT | 6 | The only English word that ends in "mt" |
| 39% | SEAGRASS | 8 | The only flowering plant that grows in the ocean |
| 39% | ONE | 3 | Only Fibonacci number that appears twice in the sequence |
| 38% | ACAI | 4 | Purple berry that grows in the Amazon rainforest |
| 38% | ELSALVADOR | 10 | Only country in Central America that doesn’t border the Caribbean |
| 38% | VIOLA | 5 | Only instrument in a typical orchestra that reads the alto clef |
| 37% | FOUR | 4 | Only number that equals the number of letters in its English name |
| 36% | MESAARIZONA | 11 | Only city that has two Spring Training stadiums in the 14-Across (2 wds.) |
| 35% | EAST | 4 | Only cardinal direction that does not appear in the name of a U.S. state |
| 35% | ESTONIANS | 9 | Citizens of the only country that relies significantly on online voting in elections |
| 35% | CITY | 4 | ___ College, institution that stands as Greendale's main rival in the sitcom "Community" |
| 35% | AMAZON | 6 | Rainforest which is the world's largest carbon dioxide sink that witnessed devastating wildfires in 2019 |
| 34% | AMAZON | 6 | ___ River, waterbody in South America that is central to a rainforest of the same name |
| 34% | SPARTA | 6 | City name that occurs 19 times across the US, but oddly, only twice in Greece |
| 33% | HEN | 3 | Isle that, in 1960, was the only remaining location of the N.Z. North Island saddleback bird |
| 32% | ETAL | 4 | Village in Northumberland, England, that retains the only surviving thatched roof pub (The Black Bull) in the county |
| 32% | PITTSBURGH | 10 | City that had the final letter of its name removed in 1891, only to be restored in 1911 |
| 32% | AMAZON | 6 | Largest rainforest in the world |
| 32% | EAST | 4 | Only cardinal direction that’s not in the name of a U.S. state |
| 31% | ARK | 3 | The ___ of the Covenant, biblical object that Indiana Jones and his rivals covet in the first installment of the "Indiana Jones" movies |
| 31% | NOLONGER | 8 | Only in the past |
| 31% | TOWN | 4 | The only game in ___ |
| 31% | LEST | 4 | In the event that |
| 31% | WHILST | 6 | In the time that |
| 31% | INSIDERS | 8 | Those in the know |
| 31% | SLICER | 6 | Rival Electric ___, vintage appliance to cut meats and save a trip to the deli that could be spotted in a '70s kitchen |
| 31% | SUN | 3 | Body that's visible only once every seven years, in the Ray Bradbury short story "All Summer in a Day" |
| 31% | HAM | 3 | West ___ United, English football team that is portrayed as AFC Richmond's fierce rival in the comedy series "Ted Lasso" |