1. ivory tower a state of mind that is discussed as if it were a place
  2. ivory tree tropical Asian tree with hard white wood and bark formerly used as a remedy for dysentery and diarrhea
  3. overture orchestral music at the beginning of an opera or musical
  4. overtire tire excessively
  5. overpower defeat by superior force
  6. fire tower a watchtower where a lookout is posted to watch for fires
  7. off-roader a bicycle with a sturdy frame and fat tires
  8. overdraw draw more money from than is available
  9. Eiffel Tower a wrought iron tower 300 meters high that was constructed in Paris in 1889; for many years it was the tallest man-made structure
  10. a fortiori with greater reason
  11. water tower a large reservoir for water
  12. overtone (usually plural) an ulterior implicit meaning or quality
  13. river otter sociable aquatic animal widely distributed along streams and lake borders in North America
  14. offertory the offerings of the congregation at a religious service
  15. overthrow rule against
  16. Offertory the part of the Eucharist when bread and wine are offered to God
  17. overt open and observable; not secret or hidden
  18. oratory the act of addressing an audience formally
  19. overseer a person who directs and manages an organization
  20. overtake catch up with and possibly overtake