There are 14 words that end with 'onise'.
| ionise | agonise |
| ebonise | lionise |
| ozonise | canonise |
| colonise | demonise |
| unionise | harmonise |
| patronise | skeletonise |
| synchronise | revolutionise |
Note: These 14 words that end with 'onise' are found from the USA & Canada version of the tournament Scrabble word list.