There are 16 words that start with 'droo'.
| drool | droop | drools | 
| drooly | droops | droopy | 
| drooled | drooped | droolier | 
| drooling | droopier | droopily | 
| drooping | drooliest | droopiest | 
| droopingly | ||
Note: These 16 words that start with 'droo' are found from the USA & Canada version of the tournament Scrabble word list.