There are 18 words that start with 'hoop'.
| hoop | hoops | hooped | 
| hooper | hoopla | hoopoe | 
| hoopoo | hoopers | hooping | 
| hooplas | hoopoes | hoopoos | 
| hoopless | hooplike | hoopster | 
| hoopskirt | hoopsters | hoopskirts | 
Note: These 18 words that start with 'hoop' are found from the USA & Canada version of the tournament Scrabble word list.