-ust Word Family: Word List & Practice
-ust Word Family words follow one repeating pattern, so a child who can read one of them has most of what they need to read the rest. This list has 8 grade 1-level words plus 4 decodable sentences. Practice them out loud — the most common error is dropping the final t sound.
- bust
- dust
- gust
- just
- must
- rust
- crust
- trust
Practice these words out loud
Have your child read these sentences to Word Wiz AI. It listens and shows exactly which sounds they missed, not just whether the word was right. Free, no sign-up needed to try.
Try these out loudDecodable Sentences
Every word in these sentences uses sounds your child has already learned, so they can be read by decoding rather than guessing.
- You must dust the crust.
- A gust blew the rust away.
- Just trust the bust.
- The crust has dust and rust.
How to Teach -ust Word Family Words
The -ust family finishes the trio of 'st'-ending families your child has met across -ast, -ist, and -ust, and 'must' and 'just' are two very high-frequency words that will appear constantly in the sentences and instructions your child reads going forward. Reviewing all three st-ending families together in one sitting is a strong way to confirm the pattern has fully generalized.
'Crust' and 'trust' both add a beginning blend, so save those until 'bust,' 'dust,' 'gust,' 'just,' 'must,' and 'rust' are automatic. This is also a good family to introduce the idea of using context to double-check a decoded word: if a sentence is about a pie, 'crust' makes more sense than a similar-looking word, and confirming meaning is part of real reading, not just sounding out letters.
Common Mistakes to Watch For
- Dropping the final t sound
- Struggling with beginning blends in 'crust' or 'trust'
- Confusing -ust with -ost or -ist