1. Leonotis leonurus relatively nontoxic South African herb smoked like tobacco
  2. genus Sonora ground snakes
  3. industrious characterized by hard work and perseverance
  4. undesirous having or feeling no desire
  5. genus Sinornis a genus of fossil birds
  6. Oceanites oceanicus medium-sized storm petrel
  7. pons asinorum a problem that severely tests the ability of an inexperienced person
  8. Jimenez de Cisneros prelate who was the confessor of Isabella I and who was later appointed Grand Inquisitor (1436-1517)
  9. in its own right by reason of one's own ability or ownership etc.
  10. genus Sonchus sow thistles
  11. Indian race sometimes included in the Caucasian race
  12. and so forth continuing in the same way
  13. Anthoceros hornworts
  14. indecision the trait of irresolution
  15. indecisiveness the trait of irresolution
  16. Anaxagoras a presocratic Athenian philosopher who maintained that everything is composed of very small particles that were arranged by some eternal intelligence (500-428 BC)
  17. Otus sunia Asian scops owl
  18. and so on continuing in the same way
  19. Aeneas Silvius Italian pope from 1458 to 1464 who is remembered for his unsuccessful attempt to lead a crusade against the Turks (1405-1464)
  20. genus Synercus Cape buffalo

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