Words starting with O
8,756 words start with "O". Filter by length or jump to a specific prefix below.
Words starting with O
600 of 8,756 shownShowing the 600 shortest words. Pick a length above to see the rest.
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About words starting with O
Words starting with O are useful the moment a game confirms your opening letter, whether that's a Scrabble rack, a crossword crossing letter, or a Wordle green tile in the first slot. Browse the full list above, or narrow it to an exact length, since most games fix the length before a single letter is placed.
Playing Wordle and just confirmed a green O in the first slot? Jump to 5-letter words starting with O to skip straight to the relevant list. Want the same letter at the end instead? Try words ending in O, or check words containing O anywhere in the word.
The same list gets searched a few different ways: O words, words that begin with O, or with the length in front as in five letter O words. All of them land here. If you know the length too, the shortcuts above go straight to it, and spelling the number out changes nothing about the answer.
Quick answers
How many words start with O?
There are 8,756 in our dictionary, counted across every length. Filter by length to see how those words break down by size, since a count across every length is rarely the number you actually need.
What are the best 5-letter words starting with O for Wordle?
Once a green tile locks O into the first slot, go straight to 5-letter words starting with O. From there, favor guesses that spend their remaining four slots on untested common letters rather than on letters you have already ruled out.
Can I search a full prefix instead of just O?
Yes. The search box above accepts any multi-letter prefix beginning with "o", Type O plus whichever second letter you have confirmed and the list narrows immediately, which is usually faster than scrolling a single-letter list.
Is O a good letter to open with?
It depends on frequency rather than preference. Opening words earn their keep by testing common letters, so O is a strong opener if it appears in many words and a weak one if it does not. The count at the top of this page is the quickest measure of that.
Are proper nouns included in this list?
No. The list is filtered to standard dictionary words, so names, places, and brands are excluded. That matches what Wordle, Scrabble, and most crossword grids will actually accept.