| 2026-04-21 | Prefix with center |
| 2026-04-09 | Lead-in to Pen |
| 2026-03-29 | Prefix with dermis |
| 2026-03-05 | Prefix with -logue |
| 2026-01-01 | Prefix with genetics |
| 2025-02-12 | Lead-in to -gram or -graph |
| 2024-12-21 | Lead-in to -gram |
| 2024-11-03 | Delivery room injection, informally |
| 2024-10-22 | ___Pen |
| 2024-06-26 | What may be left of center? |
| 2024-06-23 | Prefix with genetics |
| 2024-03-28 | Lead-in to -genesis |
| 2024-02-15 | Part of a pen name? |
| 2024-02-12 | Commercial lead-in to Pen |
| 2024-01-27 | Prefix with -gram |
| 2023-08-07 | Commercial prefix with Pen |
| 2023-07-30 | Lead-in to Pen |
| 2023-07-29 | Delivery room offering, informally |
| 2023-06-07 | Commercial prefix with Pen |
| 2023-01-02 | Prefix with center |
| 2022-10-30 | Lead-in to dermis |
| 2022-09-22 | Commercial prefix with Pen |
| 2022-09-15 | Prefix with center |
| 2022-05-05 | Prefix with glottis |
| 2022-04-04 | Prefix with genetics or Pen |
| 2021-09-16 | Prefix with genetics |
| 2021-08-25 | Prefix with dermis |
| 2021-05-04 | Prefix with center |
| 2021-01-01 | Prefix with -graph |
| 2020-11-30 | Commercial prefix with Pen |
| 2020-07-05 | Prefix with -graph |
| 2020-02-12 | Lead-in to a Pen used by nurses |
| 2019-08-31 | Prefix with dermis |
| 2019-04-21 | Lead-in to Pen |
| 2019-04-18 | Lead-in to center |
| 2019-01-04 | Prefix with cycle |
| 2018-08-04 | Pen lead-in |
| 2018-07-17 | Prefix with center |
| 2018-05-28 | Prefix with center |
| 2018-05-13 | Prefix with center |
| 2018-04-20 | Prefix with -genetic |
| 2018-02-18 | Prefix with dermis |
| 2018-02-06 | Prefix with center |
| 2018-01-24 | Prefix with dermis |
| 2017-09-24 | Commercial lead-in to Pen |
| 2017-05-02 | Prefix with center |
| 2017-03-04 | Lead-in to Pen |
| 2017-01-09 | Prefix with dermis |
| 2016-10-31 | Commercial lead-in to Pen |
| 2016-10-23 | Commercial prefix with Pen |
| 2016-04-18 | Prefix with -dermis |
| 2016-01-19 | Prefix with center |
| 2015-09-29 | Prefix with center or genetics |
| 2015-08-09 | Prefix with -graph |
| 2015-05-27 | Prefix with center |
| 2015-01-25 | Commercial lead-in to Pen |
| 2015-01-10 | Adrenaline, informally |
| 2014-08-14 | Commercial start for Pen |
| 2014-03-23 | Commercial lead-in to Pen |
| 2014-02-23 | Lead-in to Pen, commercially |
| 2014-02-14 | Prefix with -graph |
| 2014-02-12 | Prefix with center |
| 2013-10-08 | Prefix with center |
| 2013-09-29 | Prefix with dermis |
| 2013-09-19 | Anesthesia option, for short |
| 2012-10-02 | Prefix with -logue |
| 2012-09-24 | Prefix with dermal |
| 2012-06-02 | Prefix with central |
| 2012-05-27 | Prefix with center |
| 2011-12-08 | Prefix with center |
| 2011-08-18 | Center start? |
| 2011-01-10 | Prefix with center |
| 2010-10-13 | Dermal opening? |
| 2010-10-06 | Prefix with dermis |
| 2010-09-08 | Prefix with dermis |
| 2010-07-31 | Center opening? |
| 2010-02-17 | Prefix with center |
| 2010-02-05 | Something left of center? |
| 2009-12-04 | Dermal opening? |
| 2009-09-29 | Prefix with center or cycle |
| 2009-09-13 | Prefix with center |
| 2009-06-15 | Prefix with center |
| 2009-04-26 | Prefix with glottis |
| 2009-02-08 | Dermal opening? |
| 2009-01-28 | Prefix with center |
| 2008-09-06 | Prefix with cycle |
| 2008-08-29 | Prefix with glottal |
| 2008-08-20 | Prefix with -cardial |
| 2008-06-19 | Prefix with center |
| 2008-05-24 | Prefix with calyx or thalamus |
| 2008-03-10 | Prefix with center |
| 2008-01-15 | Prefix with dermis |
| 2008-01-05 | Center starter? |
| 2007-10-26 | Dermal opening? |
| 2006-12-16 | Prefix with center |
| 2006-07-14 | Over: Prefix |
| 2006-07-02 | Prefix with dermis |
| 2006-05-23 | Prefix with center |
| 2005-08-24 | Prefix with center |
| 2005-07-28 | Prefix with center |
| 2005-02-13 | Prefix with center |
| 2005-02-08 | Prefix with dermal |
| 2004-07-04 | Prefix with center |
| 2003-11-06 | Prefix with center |
| 2003-09-24 | Prefix with center or cycle |
| 2003-05-24 | Prefix with style or spore |
| 2003-05-15 | Prefix with center |
| 2003-03-24 | Prefix with center |
| 2003-02-02 | Prefix with dermis |
| 2002-10-27 | Prefix with gram |
| 2002-09-16 | Prefix with gram or center |
| 2002-07-21 | It could be to the left of center |
| 2002-05-04 | Prefix with cardium |
| 2001-09-10 | Prefix with center |
| 2001-08-19 | Prefix with center |
| 2001-07-18 | Prefix with center |
| 2001-07-06 | Dermal opening? |
| 2000-09-12 | Prefix with center |
| 2000-08-25 | Prefix with cycle |
| 2000-07-15 | Prefix with grammatical |
| 2000-04-26 | Center opening? |
| 2000-02-13 | Prefix with center |
| 1999-10-14 | It may be left of center |
| 1999-05-16 | Center opening |
| 1999-01-28 | Over: Prefix |
| 1999-01-12 | Prefix with center |
| 1997-11-19 | Center starter |
| 1997-07-13 | Prefix with 1-Across |
| 1996-10-31 | Prefix with center |
| 1996-08-17 | Prefix with -zoic |
| 1996-08-04 | Commercial prefix with lady |
| 1996-07-21 | Center starter |
| 1996-04-28 | Prefix with -taph |
| 1996-03-24 | Prefix with dermis |
| 1995-12-20 | Prefix with center |
| 1995-11-26 | Prefix with gram |
| 1995-11-12 | Start for center |
| 1995-04-05 | Prefix with glottis |
| 1995-03-28 | Prefix with center |
| 1993-12-30 | Prefix with glottis or gram |