There are 14 words that start with 'collu'.
| collude | colluded | colluder |
| colludes | colluvia | colluders |
| colluding | collusion | collusive |
| colluvial | colluvium | collusions |
| colluviums | collusively | |
Note: These 14 words that start with 'collu' are found from the USA & Canada version of the tournament Scrabble word list.