| 100% | ACIDIC | 6 | Opposite of basic, in chemistry |
| 80% | BASE | 4 | Opposite of acid in chemistry |
| 80% | ACID | 4 | Opposite of base in chemistry |
| 75% | BASE | 4 | Opposite of "acid," in chemistry |
| 71% | ACID | 4 | Opposite of a base, in chemistry |
| 70% | ACID | 4 | Opposite of "base," in a chemistry class |
| 57% | OUT | 3 | Opposite of in |
| 56% | ERASE | 5 | Opposite of pencil in |
| 56% | EXHALE | 6 | Opposite of breathe in |
| 56% | SOLVENT | 7 | Opposite of in debt |
| 55% | AZO | 3 | Kind of compound in chemistry |
| 55% | IONIC | 5 | Kind of bond in chemistry |
| 55% | ATOMIC | 6 | Kind of number in chemistry |
| 55% | AMINO | 5 | Kind of group in chemistry |
| 55% | ICI | 3 | Opposite of "là," in French |
| 55% | LENIS | 5 | Opposite of fortis, in phonetics |
| 55% | NEU | 3 | Opposite of alt, in German |
| 55% | NIE | 3 | Opposite of always, in Augsburg |
| 55% | AMOI | 4 | Opposite of yours, in Tours |
| 55% | OUI | 3 | Opposite of "non," in France |
| 55% | SHARP | 5 | Opposite of mild, in cheeses |
| 55% | SIE | 3 | Opposite of me, in Munich |
| 55% | SAFE | 4 | Opposite of "out" in baseball |
| 55% | STAC | 4 | Opposite of legato, in mus. |
| 55% | STETS | 5 | Opposite of deletes, in typesetting |
| 55% | NEU | 3 | Opposite of old, in Germany |
| 55% | OUT | 3 | Opposite of "safe" in baseball |
| 55% | NON | 3 | Opposite of "oui," in French |
| 55% | FOUL | 4 | Opposite of fair, in baseball |
| 55% | FAIR | 4 | Opposite of foul, in baseball |