There are 11 words that start with 'ingu'.
| ingulf | ingulfs | 
| inguinal | ingulfed | 
| ingulfing | ingurgitate | 
| ingurgitated | ingurgitates | 
| ingurgitating | ingurgitation | 
| ingurgitations | |
Note: These 11 words that start with 'ingu' are found from the USA & Canada version of the tournament Scrabble word list.