The two vowels rule states that when any two vowels are together, the first one says its long sound and the second is silent. Since the letter O and the letter A are two vowel letters, OA are pronounced as the long O sound as in boat or the OR sound in broad sometimes.

1. Select the Rules tab.
2. Choose ...OA... as below.
3. Click >> button as below until you see the similar words.
4. Go through the words in the list box.
5. You will see that the letter O is in red and the letter A is in gray color, meaning that the letter A is silent and only the letter O is pronounced as the letter O itself.
6. Now if you learn a new word such as soak, you shall apply the OA rule to help you remember that the word soak is pronounced as S-O-K.

There are exceptions. If OA is followed by the letter R, you need to pronounced OAR together as the OR sound in roar.