| 100% | SIB | 3 | Brother or sister, for short |
| 79% | SIBS | 4 | Brothers and sisters for short |
| 73% | SIBS | 4 | Brothers and sisters, for short |
| 64% | SIBS | 4 | One's brother and sister, for short |
| 61% | SIBLING | 7 | Brother or sister |
| 61% | SIBS | 4 | Brothers or sisters |
| 60% | SIB | 3 | Brother or sister, informally |
| 59% | NIECE | 5 | Brother or sister's daughter |
| 58% | REL | 3 | Little brother or sister? |
| 58% | NOVITIATE | 9 | New brother or sister |
| 57% | CUSACK | 6 | Noted acting brother or sister |
| 56% | NIECES | 6 | Daughters of a brother or sister |
| 56% | AMEN | 4 | Comment to a brother or sister |
| 56% | NEPHEWS | 7 | Sons of a brother or sister |
| 55% | NEPHEW | 6 | Male child of your brother or sister |
| 55% | NIECES | 6 | Female children of your brother or sister |
| 55% | ONLY | 4 | ___ child (person with no brothers or sisters) |
| 53% | ONLY | 4 | Kind of child who has no brothers or sisters |
| 51% | PETITE | 6 | Garment size for short or slender women |
| 51% | SIS | 3 | Brother's sibling, for short |
| 51% | SIS | 3 | Brother's counterpart, for short |
| 49% | ACAD | 4 | "A" in USNA, for short (a college or university) |
| 49% | TRIO | 4 | The Jonas Brothers or the Bee Gees, for example |
| 49% | AFB | 3 | Lackland or Lowry, for short |
| 49% | EMP | 3 | Nero or Napoleon, for short |
| 49% | ISP | 3 | Mindspring or AOL, for short |
| 49% | NLER | 4 | Red or Card, for short |
| 49% | NLER | 4 | Met or Card, for short |
| 49% | SLAV | 4 | Bosnian or Serb, for short |
| 49% | DIR | 3 | Spielberg or Scorsese, for short |