Words that Start with O


Starting with OA

Starting with OB

Starting with OC

Starting with OD

Starting with OE

Starting with OF

Starting with OG

Starting with OH

Starting with OI

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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