OO is two different sounds wearing the same outfit. There's long OO, the one in moon and zoo, and short OO, the one in book and foot. Kids handle both vowels early and easily in speech. The place OO earns real attention is vocabulary and early reading, where the two-sounds-one-spelling trick genuinely confuses new readers.
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Download the free PDF See all free printablesThe two OO sounds
Long OO is made with tight, rounded lips and it can stretch forever, which is why kids love it: moooon. Short OO is quicker and more relaxed, like the vowel in book. Neither is a late or difficult speech sound, so treat this page as a word collection rather than a therapy target. If your child's vowels sound consistently unusual past age 3, that's a different situation, and worth a conversation with an SLP.
Long OO words (like moon)
| Word | Word |
|---|---|
| moon | food |
| zoo | boot |
| spoon | room |
| pool | tooth |
| goose | broom |
| school | noodle |
| balloon | igloo |
| scooter | kangaroo |
Short OO words (like book)
| Word | Word |
|---|---|
| book | look |
| cook | foot |
| good | hood |
| wood | hook |
| took | shook |
| wool | cookie |
Same sound, different spelling
The long OO sound also hides in words without a double O. Handy to know when your child asks why "blue" and "zoo" rhyme.
| Spelling | Example words |
|---|---|
| ue | blue, glue, true |
| ew | new, chew, flew, grew |
| o / oe | two, who, shoe |
| ui | fruit, juice, suit |
Moon or book? A quick sorting game
Once kids can hear the difference, sorting becomes a favorite game: say a word, then ask "moon sound or book sound?" Start with obvious pairs like zoo and look, and keep it playful rather than quiz-like.
How to practice OO words during normal routines
| Routine | One way to practice |
|---|---|
| Bedtime | Goodnight Moon was practically written for this page. Stretch the moooon together. |
| Mealtime | Noodles, fruit, juice, spoons: narrate dinner and you've covered both OO sounds. |
| Car rides or walks | Zoo trips and school runs are OO goldmines. Name what you pass. |
| Bath time | Pour water with a cup and narrate: "Whoosh! The pool is full." |
More word lists like this one
This page is part of our full set of speech therapy word lists, which covers every consonant sound, the trickier vowels, and words sorted by syllable count. For the trickier vowels, see short I words and long U words. If you want the bigger picture of which sounds come in at which ages, our sound development timeline lays out the whole sequence.
Frequently asked questions
What are the two OO sounds?
Long OO is the stretched sound in moon, zoo, and food. Short OO is the quick sound in book, look, and foot. Same spelling, two different vowels, which is why early readers find OO words confusing at first.
How do I teach my child the difference between the OO in moon and the OO in book?
Through contrast, not explanation. Play the sorting game: say zoo, then book, and ask which one has the long stretchy sound. Exaggerate at first, then dial back as they catch on.
Are OO sounds hard for kids to say?
No. Vowels, including both OO sounds, come in early and rarely need speech work. OO words earn their spot in practice as vocabulary and pre-reading material, not as articulation targets.
How many words should we practice at once?
Fewer than you think. Three to five words your child actually cares about beat a list of twenty they don't. Rotate in new words once the current ones feel easy and fun.
Should I correct my child when they say a word wrong?
Skip the drills and the on-the-spot corrections. Just model the word back clearly and naturally in your answer: if your child says it their way, you say it back the adult way and keep the conversation moving. Kids absorb far more from relaxed, repeated models than from being asked to try again.
Where do I start if I want expert guidance?
You can begin with our getting started guide, which walks through how to think about your child's specific sounds and when professional support makes sense.
Sources
- Consonant acquisition ages, ASHA practice portal (checked August 2026)
- CDC Learn the Signs. Act Early milestone program (checked August 2026)
- NIDCD: Speech and Language Developmental Milestones (checked August 2026)
This page is meant as educational support for home practice, not a diagnosis. It's not a medical device, not a replacement for AAC, and not a substitute for a licensed speech-language pathologist, pediatrician, early intervention program, or school evaluation team. If you have concerns about your child's speech, the right next step is a conversation with a qualified professional who can actually see and hear your child.