There are 56 bingos that can be made by adding a single letter to "Retain". This is the fifth most of any six letter combination.

- According to the OWL4, the official word list for competitive players in North America as of March 2019

Word | Letter | Rank |
---|---|---|

Inertia | I | 3,181 |

Trainee | E | 3,744 |

Retsina | S | 4,441 |

Urinate | U | 4,594 |

Taurine | U | 4,860 |

Stearin | S | 5,006 |

Entrain | N | 5,295 |

Arenite | E | 5,471 |

Trenail | L | 5,804 |

Ingrate | G | 5,939 |

Tacrine | C | 6,180 |

Retinas | S | 6,319 |

Detrain | D | 6,319 |

Trained | D | 6,465 |

Trannie | N | 6,465 |

Nastier | S | 6,597 |

Fainter | F | 6,752 |

Retinae | E | 6,908 |

Tertian | T | 7,566 |

Ratline | L | 7,768 |

Retinal | L | 8,879 |

Terrain | R | 9,152 |

Tinware | W | 9,441 |

Nitrate | T | 9,441 |

Iterant | T | 9,794 |

Tearing | G | 9,794 |

Trainer | R | 10,100 |

Antired | D | 10,484 |

Tawnier | W | 11,800 |

Hairnet | H | 12,343 |

Minaret | M | 12,907 |

Therian | H | 13,570 |

Anestri | S | 14,251 |

Creatin | C | 14,251 |

Raiment | M | 14,970 |

Tangier | G | 14,970 |

Ruinate | U | 16,788 |

Antsier | S | 16,788 |

Reliant | L | 17,891 |

Gratine | G | 17,891 |

Pertain | P | 19,092 |

Repaint | P | 20,531 |

Nattier | T | 20,531 |

Stainer | S | 20,531 |

Painter | P | 20,531 |

Inearth | H | 22,190 |

Latrine | L | 22,190 |

Uranite | U | 26,159 |

Intreat | T | 28,624 |

Certain | C | 28,624 |

Keratin | K | 28,624 |

Retains | S | 34,771 |

Ratines | S | 43,143 |

Ceratin | C | 55,483 |

Retrain | R | 63,799 |

Granite | G | 63,799 |