English Words Starting With O

• olympic peninsula

  nounLow
  /əˌlɪm.pɪk pəˈnɪn.sjə.lə/A large, mountainous peninsula in the northwest of Washington State, USA, bounded by the Pacific Ocean, the Strait of Juan de Fuca, and Puget Sound.
• olympio

  nounExtremely Rare / Non-existent
  /əˈlɪmpiəʊ/ (Hypothetical, based on spelling)The word 'olympio' is not a standard English word and does not appear in major English dictionaries (e.g., Oxford, Merriam-Webster). It may be a proper noun, a coined/rare term, or a non-English word.
• olympus

  nounC1/C2
  /əˈlɪmpəs/A proper noun referring primarily to Mount Olympus, the highest mountain in Greece and the mythical home of the ancient Greek gods.
• olympus mons

  nounLow
  /əˌlɪm.pəs ˈmɒnz/The tallest mountain and volcano in the Solar System, located on the planet Mars.
• olynthus

  nounVery Rare
  /ˈɒlɪnθəs/A genus of calcareous sponges in the family Grantiidae.
• om

  abbreviationnounsymbolLow
  /əʊm/A sacred syllable and mantra used in Hinduism, Buddhism, and other Indian religions, representing the primordial sound of the universe, consciousness, and the ultimate reality.
• omadhaun

  nounVery Low
  /ˈɒməˌdɔːn/A fool, idiot, or simpleton.
• omagh

  nounVery low
  /ˈoʊmɑː/A proper noun referring to the county town of County Tyrone in Northern Ireland.
• omaha

  nounB2
  /ˈəʊməhɑː/The largest city in the U.S. state of Nebraska.
• omakase

  adjectivenounLow
  /ˌəʊ.məˈkɑː.seɪ/A Japanese phrase meaning "I leave it up to you," used in restaurants to indicate the customer entrusts the chef with selecting and serving a multi-course meal.
• oman

  nounC1
  /əʊˈmɑːn/A sovereign country located on the southeastern coast of the Arabian Peninsula in Western Asia.
• omani

  adjectivenounLow
  /əʊˈmɑːni/A demonym: pertaining to Oman, its people, culture, or language.
• omar

  nounLow
  /ˈəʊmɑː/A male given name of Arabic origin, meaning 'flourishing, long-lived, eloquent'.
• omar khayyam

  nounLow (proper noun, cultural/historical reference)
  /ˌəʊmɑː kaɪˈjɑːm/A 12th-century Persian mathematician, astronomer, and poet, famous for his quatrains (rubaiyat).
• omasum

  nounC2 / Very Low Frequency
  /əʊˈmeɪsəm/The third compartment of the stomach of a ruminant animal, following the rumen and reticulum, also known as the 'manyplies' or 'psalterium'.
• omayyad

  nounC2
  /əʊˈmaɪæd/A member of the first dynasty of caliphs that ruled the Islamic Empire from 661 to 750 CE, and later established a caliphate in Spain (756–1031).
• omber

  nounExtremely rare/Archaic
  /ˈɒmbə/A historical card game for three players, popular in the 17th and 18th centuries, involving bidding and trumps.
• ombre

  adjectivenounC1
  /ˈɒmbrə/A gradual blending of one color hue to another, usually moving tints and shades from light to dark.
• ombrellino

  nounVery low
  /ˌɒmbrɛˈliːnəʊ/A small umbrella or parasol, typically one of a decorative or delicate nature.
• ombu

  nounRare/Very Low
  /ˈɒmbuː/A large, fast-growing South American evergreen tree (Phytolacca dioica), notable for its massive trunk that stores water and its resistance to fire.

Showing 1061–1080 of 3187 words.