1. experience the content of observation or participation in an event
  2. experienced having knowledge or skill from observation or participation
  3. inexperienced person a person who lacks knowledge of evil
  4. expensiveness the quality of being high-priced
  5. experiential of or relating to direct observation or participation
  6. experimenter bias (psychology) bias introduced by an experimenter whose expectations about the outcome of the experiment can be subtly communicated to the participants in the experiment
  7. express mail mail that is distributed by a rapid and efficient system
  8. oxygen mask a breathing device that is placed over the mouth and nose
  9. exuberance joyful enthusiasm
  10. expressionless deliberately impassive in manner
  11. expressive aphasia aphasia in which expression by speech or writing is severely impaired
  12. expressiveness the quality of being expressive
  13. expedience the quality of being suited to the end in view
  14. conscience motivation deriving from ethical or moral principles
  15. expediency the quality of being suited to the end in view
  16. experiment the act of conducting a controlled test or investigation
  17. express mirth produce laughter
  18. expertness skillfulness by virtue of possessing special knowledge
  19. expressionism an art movement focused on representing inner emotions
  20. express-mail send by express mail or courier