There are 15 words that start with 'yac'.
| yack | yacht | yacks |
| yachts | yacked | yachted |
| yachter | yacking | yachters |
| yachting | yachtman | yachtmen |
| yachtings | yachtsman | yachtsmen |
Note: These 15 words that start with 'yac' are found from the USA & Canada version of the tournament Scrabble word list.