| 2024-12-13 | Book identifier, often |
| 2024-11-10 | It's attached to covers and sheets |
| 2024-07-20 | Courage |
| 2024-03-31 | Fortitude |
| 2019-06-23 | Fortitude |
| 2017-07-17 | Backbone |
| 2017-03-17 | Title locale |
| 2015-07-27 | Backbone |
| 2013-07-30 | Chiropractor's target |
| 2012-04-08 | Contortionist's bendy part |
| 2012-03-19 | Backbone |
| 2011-01-22 | Chicken's lack |
| 2009-10-02 | Moral fiber |
| 2009-03-07 | Title holder |
| 2007-08-15 | Subject for a chiropractor |
| 2007-08-08 | Coward's lack |
| 2007-03-14 | Book part |
| 2006-04-30 | Resoluteness |
| 2005-05-13 | It can be tapped |
| 2005-03-08 | Place for a title |
| 2002-09-27 | It has disks |
| 2002-01-02 | Title holder? |
| 2001-09-26 | Porcupine's pointer |
| 2001-07-26 | Refusal to buckle |
| 2000-12-27 | Tingle area? |
| 1999-10-10 | Gumption |
| 1999-08-31 | Coward's lack |
| 1997-01-27 | Vertebra locale |
| 1996-08-09 | Quill |
| 1996-02-29 | Hardcover part |
| 1994-12-31 | Stiffness |
| 1994-08-16 | Part of a book |