| 100% | ISOTONE | 7 | One of a group of atoms having the same number of neutrons but a different number of protons |
| 67% | ISOTONE | 7 | Either of two species of atoms with the same number of neutrons and a different number of protons |
| 50% | ISOTOPE | 7 | One of two or more atoms with the same atomic number that contain different numbers of neutrons |
| 49% | ISOTONES | 8 | Atoms that have the same number of neutrons |
| 47% | ISOMER | 6 | Compound with the same number of atoms in a different arrangement |
| 42% | ISOTOPES | 8 | Atoms with the same number of protons |
| 39% | ISOTOPES | 8 | Same number of protons, different neutrons |
| 36% | ASPURE | 6 | Having the same number of karats, e.g. |
| 36% | ISOMEROUS | 9 | Having the same number of parts, in biology |
| 35% | SEAANEMONE | 10 | One of a group of water-dwelling animals of the order Actinaria |
| 34% | ELDAD | 5 | One of a pair of prophets mentioned in the Book of Numbers |
| 33% | BOISE | 5 | State capital that has the same number of letters as its state |
| 33% | ROAD | 4 | The Beatles had a long one of these on their last number-one hit on the Billboard Hot 100 |
| 33% | GIRL | 4 | One of a group who "just wanna have fu-un": Cyndi Lauper |
| 32% | STARBOY | 7 | The Weeknd's 2016 album, that has a single by the same name, which reached number one on the Billboard Hot 100 |
| 32% | COMMUNITY | 9 | A group of people living in the same place |
| 32% | SKALD | 5 | One of a number of travelling Scandinavian poets of the Viking and Middle Ages |
| 32% | ENHARMONIC | 10 | Having the same pitch but written differently, in a score |
| 32% | MONAD | 5 | Atom having a valence of one |
| 31% | OILRESERVE | 10 | The Gulf of Mexico has a big one |
| 31% | PADRES | 6 | One of five MLB teams that has appeared in the World Series but never won the title |
| 31% | QUASAR | 6 | One of a number of astronomical bodies thought to be the most luminous objects in the universe |
| 31% | CONTEST | 7 | One might involve guessing the correct number of jelly beans in a jar |
| 31% | KAMIKAZE | 8 | One of a group of Japanese aircraft pilots of the Special Attack Unit in the Second World War who performed suicidal missions |
| 31% | SEN | 3 | One percent of a D.C. group--or the group itself |
| 31% | SETPOINT | 8 | In tennis, the last one to win a group of games |
| 30% | OZONE | 5 | The earth has a layer of it; three oxygen atoms |
| 30% | AGESET | 6 | A social group of people born around the same time |
| 30% | VIEW | 4 | A penthouse might have a good one of the city |
| 30% | TEE | 3 | One of a group of 18 |