One

Words related to the number one.

• What words refer to one?
  one first individual single only the one one apiece one each
• What words refer to being by yourself?
  alone by yourself sole
• What words refer to doing something by yourself?
  alone on your own solo solely
• What words refer to people doing something one by one?
  one by one singly individually
• What words indicate that something happens or is done one time?
  once one time single time one-off