There are 10 words that start with 'jabb'.
| jabbed | jabber | 
| jabbers | jabbing | 
| jabbered | jabberer | 
| jabberers | jabbering | 
| jabberwocky | jabberwockies | 
Note: These 10 words that start with 'jabb' are found from the USA & Canada version of the tournament Scrabble word list.