1. subway fare the fare charged for riding a subway train
  2. subwoofer a loudspeaker that is designed to reproduce very low bass frequencies
  3. subtle difficult to detect or grasp by the mind or analyze
  4. subvert overthrow or destroy completely
  5. sweep over overcome, as with emotions or perceptual stimuli
  6. subfigure a figure that is a part of another figure
  7. safari a journey to hunt or see animals, especially in Africa
  8. subversive in opposition to an established system or government
  9. swap file the disk space that is set aside for virtual memory
  10. spitfire a highly emotional and quick-tempered person
  11. bus fare the fare charged for riding a bus or streetcar
  12. cab fare the fare charged for riding in a taxicab
  13. by far by a considerable margin
  14. speak for be a spokesperson for
  15. before at or in the front
  16. spare more than is needed, desired, or required
  17. spyware computer software that obtains information from a user's computer without the user's knowledge or consent
  18. subsidiary functioning in a supporting capacity
  19. self-aware aware of yourself as an individual or of your own being and actions and thoughts
  20. subway train a train that runs in a subway system