Synonyms: Words Starting with "O"

Synonyms are words with similar meanings. Below is a list of 18 words starting with the letter "O", along with their synonyms. Practicing these will help you improve your vocabulary, making your speech or writing more varied and interesting.

Word Definition, Synonyms, and Example Sentences

  1. Obstruct (Verb) 🔊

    1. Meaning: To block or prevent movement, access, or progress.
    2. Synonyms: Block, Hinder, Impede, Prevent
    3. Use of Obstruct in Sentence:
      1. The fallen tree obstructed the road, causing a traffic jam.
      2. He was arrested for trying to obstruct justice.

  2. Obliging (Adjective) 🔊

    1. Meaning: Willing to help others; helpful.
    2. Synonyms: Helpful, Accommodating, Willing, Cooperative
    3. Use of Obliging in Sentence:
      1. She was always obliging and helped everyone in need.
      2. The obliging waiter brought our order quickly.

  3. Obscure (Adjective/Verb) 🔊

    1. Meaning: Not well known; not clearly understood or expressed.
    2. Synonyms: Unclear, Vague, Ambiguous, Obscured
    3. Use of Obscure in Sentence:
      1. The meaning of the poem was obscure to many readers.
      2. He tried to obscure the truth during his testimony.

  4. Obstinate (Adjective) 🔊

    1. Meaning: Stubbornly refusing to change one's opinion or chosen course of action.
    2. Synonyms: Stubborn, Recalcitrant, Headstrong, Inflexible
    3. Use of Obstinate in Sentence:
      1. She was obstinate in her decision to leave the job.
      2. His obstinate attitude made negotiations difficult.

  5. Obtain (Verb) 🔊

    1. Meaning: To get something through effort or request.
    2. Synonyms: Acquire, Gain, Procure, Attain
    3. Use of Obtain in Sentence:
      1. She managed to obtain the necessary documents for her application.
      2. I had to obtain permission before using the facility.

  6. Obvious (Adjective) 🔊

    1. Meaning: Easily perceived or understood; clear, self-evident.
    2. Synonyms: Clear, Evident, Apparent, Manifest
    3. Use of Obvious in Sentence:
      1. It was obvious that she had worked hard on the project.
      2. The solution to the problem was obvious after careful analysis.

  7. Odious (Adjective) 🔊

    1. Meaning: Extremely unpleasant or repulsive.
    2. Synonyms: Repulsive, Hateful, Loathsome, Abhorrent
    3. Use of Odious in Sentence:
      1. His odious behavior towards his colleagues was unprofessional.
      2. The odious task of cleaning the entire house fell on him.

  8. Offensive (Adjective) 🔊

    1. Meaning: Causing someone to feel upset, angry, or hurt.
    2. Synonyms: Disrespectful, Insulting, Aggressive, Provocative
    3. Use of Offensive in Sentence:
      1. The comedian’s jokes were considered offensive by some audience members.
      2. The offensive language used in the debate was unacceptable.

  9. Occult (Adjective/Noun) 🔊

    1. Meaning: Relating to mysterious or supernatural phenomena; hidden or concealed.
    2. Synonyms: Mystical, Esoteric, Supernatural, Arcane
    3. Use of Occult in Sentence:
      1. She became interested in occult practices after reading several books on astrology.
      2. The occult sciences have intrigued people for centuries.

  10. Offspring (Noun) 🔊

    1. Meaning: A person's child or children; a young animal or plant.
    2. Synonyms: Child, Progeny, Descendant, Young
    3. Use of Offspring in Sentence:
      1. The offspring of the tiger were born in the wild.
      2. His offspring went on to become successful in their careers.

  11. Ominous (Adjective) 🔊

    1. Meaning: Giving the impression that something bad or unpleasant is going to happen.
    2. Synonyms: Foreboding, Threatening, Menacing, Sinister
    3. Use of Ominous in Sentence:
      1. The dark clouds were an ominous sign of an impending storm.
      2. He felt an ominous feeling when he walked into the abandoned house.

  12. Opaque (Adjective) 🔊

    1. Meaning: Not able to be seen through; not transparent.
    2. Synonyms: Cloudy, Unclear, Murky, Obscured
    3. Use of Opaque in Sentence:
      1. The opaque glass window blocked the view outside.
      2. The explanation was so opaque that no one understood it.

  13. Optimist (Noun) 🔊

    1. Meaning: A person who is hopeful and positive about the future.
    2. Synonyms: Hopeful, Positive thinker, Idealist, Dreamer
    3. Use of Optimist in Sentence:
      1. As an optimist, she always believed that things would work out.
      2. His optimistic outlook helped the team stay motivated.

  14. Oracular (Adjective) 🔊

    1. Meaning: Relating to an oracle or prophecy; mysterious or cryptic.
    2. Synonyms: Prophetic, Divinatory, Mysterious, Cryptic
    3. Use of Oracular in Sentence:
      1. The oracular statements left everyone wondering what would happen next.
      2. She had an oracular vision of the future.

  15. Ordain (Verb) 🔊

    1. Meaning: To officially appoint someone to a position or to decree.
    2. Synonyms: Appoint, Decree, Order, Authorize
    3. Use of Ordain in Sentence:
      1. The king ordained his son as the new ruler of the kingdom.
      2. He was ordained as a priest after completing his studies.

  16. Ornamental (Adjective) 🔊

    1. Meaning: Serving as decoration or embellishment.
    2. Synonyms: Decorative, Embellishing, Adorning, Fancy
    3. Use of Ornamental in Sentence:
      1. The ornamental vases were placed on the mantelpiece.
      2. She wore an ornamental necklace to the gala.

  17. Outbreak (Noun) 🔊

    1. Meaning: A sudden occurrence of something undesirable, such as a disease or conflict.
    2. Synonyms: Eruption, Explosion, Outburst, Flare-up
    3. Use of Outbreak in Sentence:
      1. The outbreak of the virus led to widespread panic.
      2. There was an outbreak of protests in the city.

  18. Outrage (Noun/Verb) 🔊

    1. Meaning: An extreme anger or shock caused by something offensive or morally wrong.
    2. Synonyms: Anger, Indignation, Fury, Scandal
    3. Use of Outrage in Sentence:
      1. The public outrage over the scandal was immense.
      2. The decision to cut funding was met with outrage from the community.

List of Words with Synonyms

Word Synonyms
Obstruct Block, Hinder, Impede, Prevent
Obliging Helpful, Accommodating, Willing, Cooperative
Obscure Unclear, Vague, Ambiguous, Obscured
Obstinate Stubborn, Recalcitrant, Headstrong, Inflexible
Obtain Acquire, Gain, Procure, Attain
Obvious Clear, Evident, Apparent, Manifest
Odious Repulsive, Hateful, Loathsome, Abhorrent
Offensive Disrespectful, Insulting, Aggressive, Provocative
Occult Mystical, Esoteric, Supernatural, Arcane
Offspring Child, Progeny, Descendant, Young
Ominous Foreboding, Threatening, Menacing, Sinister
Opaque Cloudy, Unclear, Murky, Obscured
Optimist Hopeful, Positive thinker, Idealist, Dreamer
Oracular Prophetic, Divinatory, Mysterious, Cryptic
Ordain Appoint, Decree, Order, Authorize
Ornamental Decorative, Embellishing, Adorning, Fancy
Outbreak Eruption, Explosion, Outburst, Flare-up
Outrage Anger, Indignation, Fury, Scandal