There are 16 11-letter words that end with 'onist'.
| abortionist | adoptionist | disunionist |
| cosmogonist | creationist | divisionist |
| illusionist | eudaemonist | saxophonist |
| protagonist | religionist | revisionist |
| telephonist | tobacconist | vacationist |
| xylophonist | ||
Note: These 16 11-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)