| 100% | UNION | 5 | Intersection's counterpart, in set theory |
| 54% | ALEPH | 5 | Non-English letter used in set theory |
| 53% | VENN | 4 | John who was a pioneer in set theory |
| 50% | DOM | 3 | Sub's counterpart, in S&M |
| 47% | PST | 3 | Winter setting in S.F. |
| 47% | PDT | 3 | Summer setting in S.F. |
| 46% | PST | 3 | Winter clock setting in S.F. |
| 45% | ROUGE | 5 | Noir's counterpart in roulette |
| 45% | SIRI | 4 | Alexa's counterpart in Apple |
| 45% | IKE | 3 | Mike's counterpart in candy |
| 45% | ONE | 3 | Zero's counterpart in binary |
| 45% | ACID | 4 | Base's counterpart in chemistry |
| 45% | CREW | 4 | Cast's counterpart in theater |
| 44% | DAH | 3 | Dit's counterpart in Morse code |
| 44% | PAX | 3 | Irene's counterpart in Roman myth |
| 44% | REP | 3 | Democrat's counterpart in politics: Abbr. |
| 44% | DIT | 3 | Dah's counterpart in Morse code |
| 44% | YIN | 3 | Yang's counterpart in Chinese philosophy |
| 44% | PAPA | 4 | Mama's counterpart in story books |
| 44% | KNEE | 4 | Elbow's counterpart in the leg |
| 44% | ELOI | 4 | Morlock's counterpart in science fiction |
| 44% | ODILE | 5 | Odette's counterpart in "Swan Lake" |
| 44% | DAWN | 4 | Dusk's counterpart in the morning |
| 44% | ANT | 3 | Grasshopper's counterpart in a fable |
| 44% | DARE | 4 | Truth's counterpart in a game |
| 44% | DASH | 4 | Dot's counterpart in Morse code |
| 44% | SFO | 3 | LAX's counterpart in northern California |
| 44% | ROW | 3 | Column's counterpart in a spreadsheet |
| 44% | NERD | 4 | Jock's counterpart in teen comedies |
| 44% | CON | 3 | Pro's counterpart in a debate |