Vowel Diphthongs 39 /oy/ sound Vowel Diphthongs 38 /ow/ sound Cooking with Cathy and Cody- Delicious Dip Cooking with Cathy and Cody- Delicious Dip Short Vowel Sounds 29.2 /o/ sound Other Vowel Sounds 38 /ow/ sound Long Vowel Sounds 35.3 /ū/ or /y/ /oo/ sound Other Vowel Sounds 39 /oy/ sound Short Vowel Sounds 29.2 /o/ sound Long Vowel Sounds 35.3 /ū/ or /y/ /oo/ sound