1. singular being a single and separate person or thing
  2. Sinclair United States writer whose novels argued for social reform
  3. single out select from a group
  4. single prop a propeller plane with a single propeller
  5. swingletree a crossbar that is attached to the traces of a draft horse and to the vehicle or implement that the horse is pulling
  6. single existing alone or consisting of one entity or part or aspect or individual
  7. singlet a collarless men's undergarment for the upper part of the body
  8. singer a person who sings
  9. singularly in a singular manner or to a singular degree
  10. shingler a worker who shingles roofs
  11. singles tennis played with one person on each side
  12. single-leaf pinon of southwestern United States having solitary needles and often many stems; important as a nut pine
  13. Singer United States inventor of an improved chain-stitch sewing machine (1811-1875)
  14. singularity the quality of being one of a kind
  15. singleton the playing card that is the only card in a suit held in a bridge hand as initially dealt
  16. single cream cream that has at least 18% butterfat
  17. jungle rot skin disorder induced by a tropical climate
  18. single bed a bed for one occupant
  19. Spengler German philosopher who argued that cultures grow and decay in cycles (1880-1936)
  20. Singapore an island to the south of the Malay Peninsula

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