There are 15 words that start with 'yeas'.
| yeas | yeast | yeasts |
| yeasty | yeasted | yeasayer |
| yeastier | yeastily | yeasting |
| yeasayers | yeastiest | yeastless |
| yeastlike | yeastiness | yeastinesses |
Note: These 15 words that start with 'yeas' are found from the USA & Canada version of the tournament Scrabble word list.