| 100% | EVENTHORIZON | 12 | Boundary marking the limits of a black hole |
| 56% | EVENTHORIZON | 12 | Boundary of a black hole |
| 55% | DENSE | 5 | Like the center of a black hole |
| 45% | BOUNDARY | 8 | Line that marks the limits of an area |
| 44% | DELIMIT | 7 | Mark the boundaries of |
| 43% | BASELINE | 8 | Boundary at the end of a tennis court |
| 42% | HEMLINE | 7 | It marks the end of a shift |
| 42% | BOUNDARY | 8 | Line marking the edge of a cricket pitch |
| 42% | TEEMARKER | 9 | Indicator at the start of a golf hole |
| 42% | LIPPEDOUT | 9 | Rolled across the edge of a golf hole |
| 41% | EVENTHORIZON | 12 | Black hole's boundary / Despite the fact that [split] |
| 41% | PIT | 3 | The center of a cherry, or a deep hole |
| 41% | PLACEASHESONONESFARAD | 21 | Mark the beginning of Lent in a shocking way? |
| 40% | USHERIN | 7 | Mark the beginning of, as a new era (2 wds.) |
| 40% | KYIV | 4 | Capital of a nation on the Black Sea |
| 40% | CUSP | 4 | Point that marks the beginning of a change |
| 40% | MARSHAL | 7 | Official who marks the route of a race |
| 40% | CROWRINGGLORY | 13 | The magnificence of a black bird when it wears a circular piece of jewelry? (Toyota) |
| 40% | BASELINE | 8 | It marks the length end of a tennis court |
| 40% | EYE | 3 | Hole at the top of a needle |
| 40% | DRAIN | 5 | Hole at the bottom of a bathtub |
| 40% | DRAIN | 5 | Hole at the bottom of a sink |
| 39% | PECOS | 5 | River that once marked the boundary of the Wild West |
| 39% | MTDANA | 6 | Peak that marks the eastern boundary of Yosemite Natl. Park |
| 39% | EIGHTBALL | 9 | The black sphere in a game of pool |
| 39% | BASELINE | 8 | Mark at each end of a tennis court denoting the limit of play |
| 39% | HEDGE | 5 | Row of bushes that mark a boundary |
| 38% | BEAUTY | 6 | Black __, the chronicle of a horse's sad life |
| 38% | EFLAT | 5 | One of the black keys on a piano |
| 38% | WATERLINE | 9 | Mark that shows the level of a river |