There are 6 15-letter words that end with 'sions'.
| hyperextensions | interdiffusions |
| seroconversions | overpersuasions |
| retransmissions | uncircumcisions |
Note: These 6 15-letter words that end with 'sions' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with ssions, usions, rsions, nsions, isions, asions, lsions, osions, esions.
7-letter words end with 'sions' (5)