| 100% | UNARY | 5 | Having a single element |
| 69% | UNIPED | 6 | Having a single foot |
| 69% | ADHOC | 5 | Having a single purpose |
| 69% | UNIPOLAR | 8 | Having a single pole |
| 69% | UNARY | 5 | Having a single dimension |
| 68% | TASTE | 5 | Have a single bite of |
| 66% | HAPLOID | 7 | Having a single set of unpaired chromosomes |
| 65% | OCELLUS | 7 | An eye having a single lens |
| 65% | ISLET | 5 | It may have a single palm |
| 64% | ISLET | 5 | It might have a single coconut tree |
| 64% | DUAL | 4 | Having a couple of elements |
| 63% | UNARY | 5 | Involving a single element, as a math operation |
| 62% | ODONNELL | 8 | She had a single-season stint on "The View" |
| 62% | ISLE | 4 | It usually has a single palm tree, in cartoons |
| 62% | CAL | 3 | Diet Coke doesn't have a single one: Abbr. |
| 61% | CUSPID | 6 | Tooth having a single point, like a dog's fang |
| 60% | EEL | 3 | Fish that might have a single long fin on top |
| 60% | EYE | 3 | A Cyclops has a single one |
| 58% | ONETRACK | 8 | Have a ___ mind (be preoccupied with a single subject): Hyph. |
| 57% | ESTELLE | 7 | British singer who had a hit single American Boy |
| 55% | LOEB | 4 | Lisa ___ (first unsigned artist to have a Billboard No. 1 single) |
| 54% | LORDE | 5 | Youngest solo artist to have a US #1 Billboard Hot 100 single |
| 53% | ATLAS | 5 | Reference book that might have a page for a single country or state |
| 53% | CHER | 4 | Only singer to have a #1 single in six straight decades (1960s-2010s) |
| 51% | ONBASE | 6 | Having just hit a single, say (2 wds.) |
| 51% | MCCUTCHEON | 10 | Martine —, EastEnders and Love Actually actress who had a UK No. 1 single in 1999 |
| 50% | MONOPHONY | 9 | Music having only a single melodic line |
| 48% | STARBOY | 7 | The Weeknd's 2016 album, that has a single by the same name, which reached number one on the Billboard Hot 100 |
| 48% | ONE | 3 | A single |
| 47% | RUSSIANROULETTE | 15 | Game that has only a single round |