Last seen in:
- The Washington Post Sunday - Mar 20 2022
- L.A. Times Daily - Oct 12 2021
- The Washington Post - Oct 12 2021
- Newsday.com - Jul 25 2021
- Universal - Aug 5 2018
- Newsday.com - Dec 4 2016
- L.A. Times Daily - Jun 16 2015
- Premier Sunday - King Feature Syndicate - Nov 23 2014
- Universal - Oct 27 2014
- Newsday.com - Apr 18 2014
Related Clues:
- Kind of fertilizer
- Unbreathable part of an atmosphere
- Potassium oxide
- River pollutant
- Compound used as fertilizer
- Explosive compound
- Fertilizer chemical
- Rejected scratch 'n' sniff sticker #2
- Bleaching chemical
- Munitions compound
- KNO3
- Nitrogenous waste
- Pungent gas
- Beef-curing compound
- Common fertilizer ingredient