| 2026-03-13 | Powerful auto engine type |
| 2026-01-03 | Prefix with sphere |
| 2024-09-15 | Lead-in to sphere |
| 2022-12-04 | Half: Prefix |
| 2022-04-24 | Engine type, informally |
| 2019-12-18 | Muscle car engine |
| 2019-01-21 | Hot-rod engine, informally |
| 2018-12-12 | Prefix with cycle or sphere |
| 2018-06-14 | Powerful engine, informally |
| 2018-03-24 | Powerful car engine |
| 2017-12-17 | Powerful engine, for short |
| 2017-07-12 | Prefix meaning "half" |
| 2016-10-10 | Half: Prefix |
| 2016-08-10 | Powerful engine, informally |
| 2015-01-19 | Prefix with sphere |
| 2014-12-28 | Half- |
| 2012-07-12 | ___ engine |
| 2012-05-08 | Spheric opener? |
| 2012-02-27 | Prefix with sphere |
| 2010-09-26 | Certain engine |
| 2010-02-09 | Prefix with sphere |
| 2009-12-10 | Prefix with sphere |
| 2009-07-29 | Prefix with sphere |
| 2008-12-08 | Powerful auto engine |
| 2008-10-14 | Hot-rod engine, briefly |
| 2008-04-09 | Prefix with sphere |
| 2007-08-09 | Kind of engine |
| 2006-04-17 | Prefix with sphere |
| 2006-04-05 | Half: Prefix |
| 2006-02-14 | Prefix with sphere |
| 2006-01-09 | Prefix with sphere |
| 2003-10-26 | Powerful car engine, informally |
| 2003-08-27 | Half in front? |
| 2003-06-11 | Half: Prefix |
| 2003-02-04 | Prefix with sphere |
| 2002-12-21 | Powerful auto engine |
| 2002-11-05 | Prefix with 48-Down |
| 1999-09-24 | Half in front? |
| 1999-03-23 | Prefix with spherical |
| 1999-03-14 | Prefix with sphere |
| 1998-08-13 | Prefix with spherical |
| 1996-09-24 | Prefix with sphere |
| 1996-04-04 | Prefix with sphere |
| 1995-07-13 | Hot-rod engine, for short |