O starts about 3% of English words, despite being the second most common letter in English text. Most O-word appearances come from "of," "on," "or," and "one" — extremely high-frequency function words. Longer O-words often draw from Latin roots: "omni-" (all), "ob-" (against), and "oper-" (work) — OMNIVORE, OBSTACLE, OPERATE.
Complete list of words starting with O, from 3-letter to 8-letter words. Each word shows its game score — tap any word for its definition.
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There are 50 words that start with the letter O in the LexiClash dictionary, ranging from 3 to 8 letters long. The most common lengths are 4, 5, 6 letters.
O is the only letter that is also a word in standard English ("Oh" and "O" for direct address). In chemistry, O is the symbol for oxygen. In musical notation, O above a string indicates an open string. The letter's circular shape dates back to the Phoenician "ayin," meaning eye.
Some popular O-words include OAKLAND, OAKWOOD, OASIS, OBAMA, OBERON, OBJECT, OBJECTIO, OBOE. Browse the full list above organized by word length, with game scores for each word.
O starts about 3% of English words, despite being the second most common letter in English text. Most O-word appearances come from "of," "on," "or," and "one" — extremely high-frequency function words. Longer O-words often draw from Latin roots: "omni-" (all), "ob-" (against), and "oper-" (work) — OMNIVORE, OBSTACLE, OPERATE.
LexiClash is a free word game where you find words on a letter grid under time pressure. It's the best way to practice vocabulary and improve your word skills.
Short O-words are precious: OX, OD, OE, OM, OP (all valid in standard word game dictionaries). The OU- cluster gives productive mid-range words: OUST, OURS, OUNCE, OUTER. Look for OVE- sequences on the grid — OVER is a prefix that generates OVERDO, OVERLAP, OVERRIDE.
Start Practicing →The highest-scoring word starting with O is ORION worth 50 points. Longer words earn more points — find them on the grid to boost your score.
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