| A | B |
|---|
| Antacid | a substance that works against stomach acid |
| antibacterial | designed to fight against or kill bacteria |
| antidote | a remedy or cure; something that works against a poison |
| antihistamine | a medicine that works against colds and allergies |
| antonym | a word that means the opposite of another word |
| retroactive | goes back to a prior time |
| retrofit | to go back and install something that was not available at the time of original manufacturing |
| retrospective | characterized by looking back at the past and reflecting; related to the past |
