There are 10 15-letter words that end with 'ian'.
| antiegalitarian | antilibertarian |
| biostatistician | crossopterygian |
| nontotalitarian | platitudinarian |
| postmillenarian | parliamentarian |
| psychohistorian | psychometrician |
Note: These 10 15-letter words that end with 'ian' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with rian, cian, lian, dian, nian, sian, tian, pian, gian, hian, mian, vian, bian, eian, fian, uian.
4-letter words end with 'ian' (1)