13-Letter Words End with 'onal'

There are 88 13-letter words that end with 'onal'.

biconditional	bidirectional
abstractional	acquisitional
aggregational	arbitrational
archidiaconal	associational
attributional	calculational
coeducational	collocational
combinational	declinational
deformational	dispositional
compositional	compressional
computational	congressional
conjugational	conjunctional
connotational	contractional
convocational	correlational
dysfunctional	gravitational
hyperrational	metafictional
examinational	expectational
explorational	multinational
multiregional	fluctuational
immigrational	incantational
inclinational	informational
inquisitional	inscriptional
inspirational	institutional
instructional	interactional
international	interneuronal
interpersonal	interregional
intrapersonal	neurohormonal
nonfunctional	nonvocational
observational	postembryonal
postulational	permutational
septentrional	orientational
oscillational	overemotional
ovipositional	rarefactional
reformational	prepositional
prevocational	progressional
propositional	supernational
superpersonal	superregional
suppositional	supranational
suprarational	terminational
transactional	transfusional
translational	transnational
transpersonal	ultrarational
unconditional	unexceptional
unintentional	unsensational
untraditional	vivisectional

Note: These 88 13-letter words that end with 'onal' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words end with ional, gonal, sonal, ronal, tonal, monal, zonal, conal, lonal, honal, oonal, yonal, bonal, eonal, xonal.

5-letter words end with 'onal' (2)
6-letter words end with 'onal' (7)
7-letter words end with 'onal' (7)
8-letter words end with 'onal' (25)
9-letter words end with 'onal' (33)
10-letter words end with 'onal' (45)
11-letter words end with 'onal' (62)
12-letter words end with 'onal' (70)
13-letter words end with 'onal' (88)
14-letter words end with 'onal' (43)
15-letter words end with 'onal' (34)