There are 17 words that start with 'crud'.
| crud | crude | cruds | 
| cruddy | cruder | crudes | 
| crudded | crudely | crudest | 
| crudity | cruddier | crudding | 
| crudites | cruddiest | crudeness | 
| crudities | crudenesses | |
Note: These 17 words that start with 'crud' are found from the USA & Canada version of the tournament Scrabble word list.