| 100% | CAUSALITY | 9 | The relationship between cause and effect |
| 62% | TIMELAG | 7 | Period between cause and effect |
| 54% | YIELDCURVE | 10 | Line showing the relationship between an interest rate and maturity date |
| 52% | ERGONOMICS | 10 | Study of the relationship between workers and their environment |
| 52% | FOSSEVERDON | 11 | 2019 FX miniseries portraying the relationship between choreographer Bob and dancer Gwen: 2 wds. |
| 51% | SECRETARY | 9 | 2002 romantic-comedy starring Maggie Gyllenhaal, about the relationship between a man and his assistant |
| 51% | TED | 3 | Movie starring Mark Wahlberg, about the relationship between a boy and his live teddy bear |
| 50% | CATSINTHE | 9 | "___ Cradle," a song by Harry Chapin about the relationship between a father and his son: 3 wds. |
| 49% | PATHOLOGY | 9 | The science of the causes and effects of diseases |
| 49% | PATHOLOGY | 9 | The science of the causes and effects of disease |
| 48% | KARMA | 5 | Buddhist belief involving cause and effect |
| 48% | KARMA | 5 | Spiritual principle of cause and effect |
| 47% | GAMIFICATION | 12 | What's caused a mismatch between the starred clues and their answers |
| 46% | KARMA | 5 | Cosmic cause and effect |
| 44% | KARMA | 5 | Buddhist's concept of cause and effect |
| 42% | SYMBIOSIS | 9 | Relationship between barnacles and whales, e.g. |
| 42% | SYMBIOSIS | 9 | Relationship between barnacles and whales, e.g |
| 41% | ANO | 3 | The difference between Jan and Joan? |
| 41% | URANUS | 6 | The planet between Saturn and Neptune |
| 41% | MIDRIFF | 7 | The area between chest and belt |
| 41% | TWILIGHT | 8 | The period between day and night |
| 41% | ANI | 3 | The difference between Mara and Maria? |
| 41% | BLURREDLINE | 11 | The difference between ethical and unethical, sometimes |
| 39% | RIPARIAN | 8 | The interface between land and a river or stream |
| 39% | FOREHEAD | 8 | The space between the eyebrows and hairline |
| 39% | FOREARM | 7 | The section between the hand and elbow |
| 39% | SEA | 3 | Between the devil and the deep blue ___ |
| 39% | DEEP | 4 | Between the devil and the ___ blue sea |
| 39% | MIDSEASON | 9 | Between the premiere and the finale, say |
| 39% | FOREHEAD | 8 | The area between your hairline and eyebrows |