There are 16 words that end with 'trial'.
| trial | atrial | 
| retrial | mistrial | 
| pretrial | posttrial | 
| industrial | intertrial | 
| semestrial | sinoatrial | 
| endometrial | terrestrial | 
| nonindustrial | preindustrial | 
| postindustrial | semiterrestrial | 
Note: These 16 words that end with 'trial' are found from the USA & Canada version of the tournament Scrabble word list.