| caffeine → IsA → stimulant | 0.68 | |
| caffeine → IsA → drug | 0.65 | |
| caffeine → IsA → a central nervous system stimul… | 0.55 | |
| caffeine → IsA → stimulant drug | 0.48 | |
| caffeine → IsA → psychoactive substance | 0.42 | |
| caffeine → IsA → substance | 0.41 | |
| caffeine → IsA → alkaloid | 0.38 | |
| caffeine → IsA → addictive stimulant | 0.29 | |
| caffeine → IsA → natural substance | 0.27 | |
| caffeine → IsA → the most popular psychoactive d… | 0.24 | |
| caffeine → IsA → legal stimulant | 0.16 |