| 2021-03-08 | Existence |
| 2020-10-11 | Life form |
| 2017-04-10 | Human ___ |
| 2016-06-28 | Organism |
| 2015-03-22 | Entity |
| 2015-02-25 | Life form |
| 2014-11-11 | Existence |
| 2014-08-30 | Extraterrestrial, e.g. |
| 2014-06-01 | Human or alien |
| 2014-01-31 | It's a state |
| 2013-12-01 | Subject for the philosopher Heidegger |
| 2013-11-28 | Human ___ |
| 2012-05-30 | Essence |
| 2010-04-23 | It's alive |
| 2007-07-24 | Life form |
| 2006-09-19 | It's alive |
| 2005-03-22 | With 69-Across, song from 20-Across |
| 2003-02-04 | Existence |
| 2001-10-25 | Extraterrestrial, e.g. |
| 2000-02-15 | Living thing |
| 1999-12-23 | Human or alien |
| 1999-05-09 | Life form |
| 1999-01-11 | Any one of God's creatures |
| 1997-12-15 | Existence |
| 1996-04-17 | Existence |
| 1996-02-18 | Since, colloquially, with "as" |