1. necessitous poor enough to need help from others
  2. necessitate require as useful, just, or proper
  3. necessity the condition of being essential or indispensable
  4. necessitarian someone who does not believe the doctrine of free will
  5. necessary absolutely essential
  6. genus Tamus a genus of tuberous vines of the family Dioscoreaceae
  7. ancestress a woman ancestor
  8. Aegospotamos a river in ancient Thrace
  9. genus Ozothamnus genus of Australian shrubs and perennial herbs
  10. systemise arrange according to a system or reduce to a system
  11. genus Astacus type genus of the family Astacidae; Old World crayfish
  12. genus Stachys large genus of usually woolly or hairy herbs or subshrubs or shrubs; temperate eastern hemisphere; tropical Australasia
  13. genus Stictomys mountain pacas
  14. consistency uniformity or stability in arrangement, behavior, or quality
  15. ecosystem organisms interacting with their physical environment
  16. genus Anastomus openbills
  17. genus Pseudemys sliders; red-bellied terrapin
  18. Christmas a Christian holiday celebrating the birth of Christ
  19. genus Eutamias chipmunks of western America and Asia
  20. genus Isatis Old World genus of annual to perennial herbs: woad