There are 10 words that start with 'subinf'.
| subinfeud | subinfeuds |
| subinfeuded | subinfeudate |
| subinfeuding | subinfeudated |
| subinfeudates | subinfeudating |
| subinfeudation | subinfeudations |
Note: These 10 words that start with 'subinf' are found from the USA & Canada version of the tournament Scrabble word list.