There are 16 words that start with 'floccu'.
| floccus | floccule | 
| flocculi | floccules | 
| flocculus | flocculant | 
| flocculate | flocculent | 
| flocculants | flocculated | 
| flocculates | flocculator | 
| flocculating | flocculation | 
| flocculators | flocculations | 
Note: These 16 words that start with 'floccu' are found from the USA & Canada version of the tournament Scrabble word list.