| 100% | PLANET | 6 | Solar system body; Mars is called the red one |
| 42% | ACE | 3 | The Red Baron was one |
| 41% | MUSE | 4 | Sappho is called the 10th one |
| 40% | CERES | 5 | Body in our solar system that was considered a planet in the first half of the 19th century |
| 39% | GIVEBLOOD | 9 | Donate the red stuff from one's body |
| 38% | ERA | 3 | The current one is called the Cenozoic |
| 38% | TOE | 3 | The biggest one is called the hallux |
| 38% | TOE | 3 | The smallest one is called a minimus |
| 38% | ORGAN | 5 | The skin is the body's largest one |
| 38% | SWEETPOTATO | 11 | The orange one is often called a yam |
| 37% | PHOBOS | 6 | One of Mars's two moons, the other is Deimos |
| 37% | OSIRIS | 6 | One who was called Lord of the West |
| 36% | SNAILMAIL | 9 | System that was called 34-Across before the Internet |
| 36% | EYES | 4 | Body parts that are called "the windows to the soul" |
| 35% | BISON | 5 | A baby one is called a red dog |
| 35% | EAR | 3 | Body part whose external portion is called the auricle |
| 35% | RPS | 3 | 45s might be called "75%-ers" if this measure were used instead of the customary one |
| 35% | BLOODCELL | 9 | The red one carries oxygen |
| 34% | EYE | 3 | The corner of one is called a canthus |
| 34% | ERIC | 4 | Explorer called the Red |
| 34% | ARTERY | 6 | The aorta is the largest one in the body |
| 33% | URIC | 4 | Type of acid that is created when the body breaks down substances called purines |
| 33% | JUPITER | 7 | Planet in the solar system known for its Red Spot |
| 33% | BONE | 4 | The femur is the longest one in the human body |
| 33% | PLANETX | 7 | Hypothetical body in the solar system beyond Neptune |
| 33% | PLANETX | 7 | Hypothetical solar system body beyond Neptune |
| 33% | QUASAR | 6 | One of a number of astronomical bodies thought to be the most luminous objects in the universe |
| 33% | GALAXY | 6 | Ours is called the Milky Way |
| 33% | UNDER | 5 | Australia is called the "Land Down __" |
| 33% | OWES | 4 | Is in the red |