Words that Start with O


Starting with OA

Starting with OB

Words that Start with O

This section will provide you with more information on the words that start with O.

Interesting notes about the letter O:

  • The letter O is the fifteenth letter of the English alphabet; it is a vowel.
  • It has a long sound \ oh \ as in open and a short sound \ uh \ as in money.
  • The Phoenicians used a circular symbol ‘ayin, the eye, which became the Greek omicron, little (o), and omega for big (O).
  • The Romans kept the Phoenician’s symbol for O.

The following are a couple of examples of words starting with O.


Animals that start with O

  • Ocelot: nocturnal wildcat of Central America and South America having a dark-spotted buff-brown coat
    • In Texas, the ocelot is considered an endangered species.
  • Orca: predatory black-and-white toothed whale with large dorsal fin; common in cold seas
    • There are no natural predators to the orca whales. 
  • Ostrich: fast-running African flightless bird with two-toed feet; largest living bird
    • The ostrich is the only bird I know of that is taller than me. 

Places that start with O

  • Outback: the bush country of the interior of Australia
    • In the outback of Australia, you can see kangaroos and koalas.
  • Orphanage: a public institution for the care of orphans
    • My grandmother’s parents died when she was young, so she was raised in an orphanage.
  • Observatory:  a building designed and equipped to observe astronomical phenomena
    • The view of the stars was beautiful from the observatory. 

Words that describe people

  • Optimistic: expecting the best in this best of all possible worlds
    • No matter how bad things get, I try to stay optimistic.
  • Overachiever: a student who attains higher standards than the IQ indicated
    • He was an overachiever on his schoolwork and music.
  • Olympian: of or pertaining to the greater gods of ancient Greece whose abode was Mount Olympus
    • The details on the statue of the Olympian god were incredible. 

Words that describe an idea

  • Obtuse: lacking in insight or discernment
    • The manager thought his plan to save hours was wonderful, but we all thought it was quite obtuse and would never work.
  • Outrageous: greatly exceeding bounds of reason or moderation
    • The ideas for the menu were outrageous and unpredicatbale, but they might just work. 
  • Opportune: suitable or at a time that is suitable or advantageous especially for a particular purpose
    • His opportune ideas was genius and saved the bird’s life just in time. 

Words that describe a place/event

  • Ornate: marked by elaborate rhetoric and elaborated with decorative details
    • Our gym was so ornate for the prom that you’d never know we played a basketball game in it two days ago.
  • Organized: methodical and efficient in arrangement or function
    • The ceremony was very well-organized and ended on time. 
  • Organic: of or relating to foodstuff grown or raised without synthetic fertilizers or pesticides or hormones
    • The organic garden is not very big but it will continue to grow as we use less pesticides on the rest of the field. 

Longest words that start with O

Long words - O

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