There are 7 8-letter words that end with 'onist'.
| arsonist | canonist | colonist | demonist |
| hedonist | simonist | unionist | |
Note: These 7 8-letter words that end with 'onist' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with ionist, gonist, honist, monist, oonist, bonist, conist, donist, lonist, nonist, ronist, sonist, tonist, yonist.
6-letter words end with 'onist' (1)