| Planetarium | planetarium |
| planetar | planetary |
| Planarie | planarian |
| Planetenring | planetary ring |
| Planetoid | planetoid |
| plantar | plantar |
| Thanetium | Thanetian |
| Nektarium | floral nectary honey leaf nectary |
| Lapidarium | lapidarium |
| Prekarium | precarium |
| Sanatorium | sanatorium |
| Planet X | Planet X |
| Plattkreuz | tau |
| PlayStation | PlayStation |
| Planer | planner |
| Planet | planet |
| Planetesimal | planetesimal |
| Plantage | plantation |
| Planum | formation level line plane planum |
| Plateau | plateau |