There are 12 words that start with 'flac'.
| flack | flacks | flacon |
| flaccid | flacked | flacons |
| flackery | flacking | flaccidly |
| flaccidity | flackeries | flaccidities |
Note: These 12 words that start with 'flac' are found from the USA & Canada version of the tournament Scrabble word list.