1. air pollution pollution of the atmosphere
  2. resolution a decision to do something or to behave in a certain manner
  3. water pollution pollution of the water in rivers and lakes
  4. appellation identifying words by which someone or something is called
  5. revolution a single complete turn
  6. irresolution the trait of being irresolute; lacking firmness of purpose
  7. antipollution intended to reduce pollution
  8. abolition doing away with a system or practice or institution
  9. ablution the act of washing oneself, as for ritual purposes
  10. tribulation an annoying or frustrating or catastrophic event
  11. pollution contamination of the natural environment
  12. repletion the state of being full
  13. evolution sequence of events involved in the development of a species
  14. assimilation the process of absorbing one cultural group into another
  15. propulsion the act of moving forward
  16. horripilation reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation
  17. eruption the sudden occurrence of a violent discharge
  18. ablation the erosive process that reduces the size of glaciers
  19. ambulation walking about
  20. repulsion the act of successfully defending against an attack