1. clean room a room that is virtually free of dust or bacteria
  2. cleaners shop where dry cleaning is done
  3. classroom a room in a school where lessons take place
  4. cloakroom a room where coats and other articles can be left temporarily
  5. clean bomb an atom bomb leaving little or no radioactive contamination
  6. cleanliness the habit of keeping free of superficial imperfections
  7. clean house clean and tidy up the house
  8. enormous extraordinarily large in size or extent or degree
  9. cleanness the state of being clean; without dirt or other impurities
  10. clearness the quality of clear water
  11. greenroom a backstage room in a theater where performers rest or have visitors
  12. cleaner someone whose occupation is cleaning
  13. cleavers annual having the stem beset with curved prickles
  14. Cleanthes ancient Greek philosopher who succeeded Zeno of Citium as the leader of the Stoic school (300-232 BC)
  15. clubroom a room used for the activities of a club
  16. clearance vertical space available to allow easy passage under something
  17. Chilean rimu about the hardiest Podocarpaceae species
  18. common room a sitting room (usually at school or university)
  19. cleanse clean one's body or parts thereof, as by washing
  20. gleaner someone who gathers something in small pieces (e.g. information) slowly and carefully