Word Families for Kids: The 37 Most Important Rimes
A 1997 study by Wylie and Durrell identified 37 word families (rimes) that appear in 500 of the most common one-syllable English words. Master these 37 patterns, and your child can decode hundreds of new words immediately.
What Are Word Families?
A word family is a group of words that share the same ending pattern — the vowel and any consonants after it. This ending part is called the rime, and the beginning consonant(s) are called the onset.
For example, the -at word family: cat, bat, hat, mat, rat, sat, flat, that. Same rime, different onsets.
When children recognize a rime pattern, they can decode any new word that uses it — even one they've never seen before. This is an enormous reading leverage point.
The 37 Most Important Word Families
These 37 rimes appear in 500 of the most common single-syllable English words. Listed alphabetically with example words for each:
5 Word Family Activities for Home and Classroom
1. Word Family Flip Books — Cut strips of paper for onsets and staple them to a card showing the rime. Children flip through onsets to create new words. Inexpensive and endlessly reusable.
2. Word Family Sort — Write 12–15 words on cards from two or three different families. Mix them up and have children sort them into groups. Great for reinforcing pattern recognition.
3. Onset Substitution Game — Start with a known word (e.g., "cat"). Ask: "What if I change /k/ to /b/?" (bat). "What if I change it to /fl/?" (flat). This rapid-fire game builds decoding fluency.
4. Word Family Poems — Challenge children to write a 4-line poem using words from one family. "The fat cat sat / on a mat with a bat / the rat sat flat / and that was that!" Creativity + phonics = retention.
5. Word Wall Families — Group your word wall by rime family instead of alphabetically. Each time a new word is added, children search for the family it belongs to — building pattern recognition every time.