| Projectile | abjet thrown or shot |
| centripetal | tendency to move to the center |
| antibiotic | stops growth of microorganisms |
| biopsy | removal of living tissue |
| biosphere | atmosphere in which living things exist |
| microbe | tiny life form |
| symbiosis | beneficial relationship |
| vivacious | lively |
| vivid | intense |
| edifice | building |
| alleviate | make bearable |
| viable | practicable |
| agenda | a plan |
| infiltrate | to enter maliciously |
| sultry | hot |