| 2026-05-21 | Something tickled on a piano |
| 2026-03-11 | Shade of off-white |
| 2025-10-13 | Elephant tusk material |
| 2025-06-01 | Warm shade of white |
| 2023-05-01 | Soap that's said to be "99 44/100% pure" |
| 2023-04-04 | Word before Coast or tower |
| 2022-10-01 | ___ tower |
| 2022-01-25 | Highbrow tower material? |
| 2019-10-18 | Bygone artist's medium |
| 2019-02-24 | Tower construction material |
| 2017-07-07 | Common wedding dress color |
| 2017-05-21 | Shade of white |
| 2017-02-03 | Key ingredient? |
| 2016-09-28 | Something the U.S. government bans the sale of |
| 2016-06-26 | Bathroom bar |
| 2015-06-28 | ___-billed woodpecker |
| 2015-02-23 | Ebony's partner |
| 2013-12-23 | Piano key material, once |
| 2012-12-30 | White shade |
| 2011-12-18 | Material in old mah-jongg sets |
| 2010-12-25 | Off-white shade |
| 2010-05-18 | "99 and 44/100% pure" soap |
| 2010-05-16 | Shade of white |
| 2008-07-30 | "It floats" sloganeer |
| 2008-06-18 | White key, informally |
| 2008-04-28 | Old piano key material |
| 2007-09-13 | Key component |
| 2007-08-12 | Some contraband |
| 2006-05-17 | Shade of white |
| 2005-12-17 | Piano bar |
| 2005-12-03 | Composition of some towers |
| 2004-11-04 | Key material |
| 2004-09-01 | Key material |
| 2004-02-23 | Off-white |
| 2004-02-07 | Subject of a commercial trade ban |
| 2003-12-18 | Procter & Gamble brand |
| 2003-11-02 | Whitish |
| 2003-06-15 | Valuable dentine |
| 2002-05-17 | Off-white |
| 2001-12-17 | Old piano key material |
| 2001-07-24 | Poacher's haul |
| 2001-05-19 | Scrimshaw medium |
| 2001-01-28 | Key material |
| 2000-01-02 | Old artificial leg material |
| 1999-11-30 | Key material |
| 1998-01-14 | Creamy white |
| 1997-06-18 | Banned article of trade |
| 1995-11-13 | Walrus tusks |
| 1995-01-08 | Procter & Gamble brand |
| 1994-06-02 | Shade of white |
| 1994-04-04 | Shade of white |
| 1994-03-25 | Scrimshaw medium |
| 1994-03-21 | Obsolescent piano key material |
| 1994-03-20 | Tusks, to a bounty hunter |