1. colloquy formal conversation
  2. colleague an associate that one works with
  3. clique an exclusive circle of people with a common purpose
  4. collogue confer secretly
  5. claque a group of followers hired to applaud at a performance
  6. calque an expression translated from another language
  7. colloquial characteristic of informal spoken language or conversation
  8. cloak a loose outer garment
  9. geology science of the history of the earth as recorded in rocks
  10. colic acute abdominal pain, especially in infants
  11. cologne a perfumed liquid made of essential oils and alcohol
  12. clock a timepiece that shows the time of day
  13. clog any object that acts as a hindrance or obstruction
  14. Cologne a commercial center and river port in western Germany on the Rhine River; flourished during the 15th century as a member of the Hanseatic League
  15. colugo arboreal nocturnal mammal of southeast Asia and the Philippines resembling a lemur and having a fold of skin on each side from neck to tail that is used for long gliding leaps
  16. dialogue a conversation between two persons
  17. ecology the environment as it relates to living organisms
  18. colour a visual attribute of things from the light they emit
  19. colloquium an academic meeting, conference, or seminar
  20. Golgi Italian histologist noted for work on the structure of the nervous system and for his discovery of Golgi bodies (1844-1926)