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15-Letter Words End with 'tional'

There are 29 15-letter words that end with 'tional'.

accommodational acculturational
antieducational antitraditional
demonstrational disproportional
communicational configurational
confrontational documentational
hyperfunctional miscegenational
multifunctional improvisational
interrogational introspectional
investigational juxtapositional
nonconventional noninflectional
nonoccupational participational
omnidirectional orchestrational
recombinational pronunciational
transcriptional transpirational
transpositional

Note: These 29 15-letter words that end with 'tional' are found from the USA & Canada version of the tournament Scrabble word list.

8-letter words end with 'tional' (5)
9-letter words end with 'tional' (10)
10-letter words end with 'tional' (23)
11-letter words end with 'tional' (42)
12-letter words end with 'tional' (57)
13-letter words end with 'tional' (72)
14-letter words end with 'tional' (38)
15-letter words end with 'tional' (29)
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