There are 14 words that start with 'dispu'.
| dispute | disputed | 
| disputer | disputes | 
| disputant | disputers | 
| disputing | disputable | 
| disputably | disputants | 
| disputation | disputations | 
| disputatious | disputatiously | 
Note: These 14 words that start with 'dispu' are found from the USA & Canada version of the tournament Scrabble word list.