| Answer | Crossword Clue |
|---|---|
| opioid | a peptide that acts like opium |
| opioids | OPIOID, a peptide that acts like opium |
| hormone | synthetic substance that acts like a hormone |
| organelle | a specialized part of a cell that acts like an organ |
| organelles | ORGANELLE, a specialized part of a cell that acts like an organ |
