ZOA
| Date | Clue |
|---|---|
| 2015-07-16 | Animal group suffix |
| 2012-09-01 | Suffix with proto- |
| 2011-09-20 | Suffix meaning "animals" |
| 2010-08-04 | Taxonomy suffix |
| 2007-07-20 | Suffix with proto- |
| 2002-06-21 | Organisms: Suffix |
| 2002-05-19 | Animal group suffix |
| 1997-08-08 | Animals: Suffix |
| 1996-08-11 | Ending with proto- |