There are 18 words that end with 'rion'.
| prion | durion |
| morion | turion |
| virion | carrion |
| chorion | clarion |
| morrion | vibrion |
| decurion | centurion |
| criterion | tellurion |
| counterion | zwitterion |
| septentrion | mitochondrion |
Note: These 18 words that end with 'rion' are found from the USA & Canada version of the tournament Scrabble word list.