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5-letter words starting with O

Use this list of five-letter words that start with O to build a quick practice set. Ask your child to say each word out loud, clap the syllables, and try to spell it. Choose 5–10 words at a time to keep practice short and positive.

  • occurverb

    To be found or met with : appear

    2 syllables
  • oceannoun

    The whole body of salt water that covers nearly three fourths of the surface of the earth

    2 syllables
  • oftenadverb

    Many times : frequently

    2 syllables
  • onionnoun

    A monocotyledonous plant (Allium cepa), allied to garlic, used as vegetable and spice.

    2 syllables
  • orbitnoun

    The bony socket of the eye

    2 syllables
  • orderverb

    To put in order : arrange

    2 syllablesGrade Grade 2
  • orderverb

    To put in order : arrange

    2 syllables
  • organnoun

    A differentiated structure (such as a heart, kidney, leaf, or stem) consisting of cells and tissues and performing some specific function in an organism

    2 syllablesGrade Grade 3
  • otheradjective

    Being the one (as of two or more) remaining or not included

    2 syllablesGrade Grade 1
  • ouncenoun

    A unit of weight equal to 1/12 troy pound

    1 syllables
  • ovalsnoun

    An elongated round shape resembling an egg or ellipse.

    Grade Grade 2Scrabble 8
  • ovarynoun

    A female reproductive organ, often paired, that produces ova and in mammals secretes the hormones estrogen and progesterone.

    Grade Grade 5Scrabble 11