15-Letter Words End with 'sion'

There are 6 15-letter words that end with 'sion'.

autotransfusion	misapprehension
immunodiffusion	incomprehension
interconversion	posttransfusion

Note: These 6 15-letter words that end with 'sion' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words end with ssion, usion, rsion, ision, nsion, asion, lsion, osion, esion.

6-letter words end with 'sion' (5)
7-letter words end with 'sion' (18)
8-letter words end with 'sion' (32)
9-letter words end with 'sion' (58)
10-letter words end with 'sion' (54)
11-letter words end with 'sion' (20)
12-letter words end with 'sion' (30)
13-letter words end with 'sion' (25)
14-letter words end with 'sion' (11)
15-letter words end with 'sion' (6)