15-Letter Words End with 'ion'

There are 194 15-letter words that end with 'ion'.

autocorrelation	autotransfusion
acclimatization	alphabetization
antisegregation	antispeculation
antivivisection	cannibalization
catheterization	circularization
circumscription	circumvallation
civilianization	codetermination
criminalization	crystallization
cyanoethylation	deacidification
decalcification	decarboxylation
decarburization	decasualization
decertification	deconcentration
decontamination	deglamorization
dehydrogenation	demagnetization
democratization	demystification
denitrification	desacralization
desensitization	desertification
desexualization	destabilization
desulfurization	detribalization
devitrification	diagonalization
dichotomization	differentiation
disarticulation	discontinuation
disintoxication	disorganization
dissatisfaction	diversification
commodification	complementation
computerization	conveyorization
counterpetition	counterquestion
counterreaction	electrification
hospitalization	hypercorrection
hyperinvolution	hyperproduction
hypersalivation	hypostatization
maldistribution	marginalization
masculinization	materialization
mathematization	megacorporation
microdissection	microprojection
miniaturization	etherealization
excommunication	exemplification
experimentation	extemporisation
extemporization	exteriorization
externalisation	externalization
latensification	misapprehension
misconstruction	misdistribution
misrecollection	misregistration
misvocalization	formularization
frenchification	familiarization
immortalization	immunodiffusion
incomprehension	inconsideration
indemnification	indetermination
infantilization	instrumentation
insubordination	intensification
interconnection	interconversion
interdigitation	intergeneration
interiorization	intermodulation
internalization	interpopulation
intervisitation	intrapopulation
intussusception	nationalization
nonconservation	nonconstruction
nonexploitation	nonintervention
nonprescription	objectification
phosphatization	phosphorylation
photoexcitation	photoionization
photoproduction	postdevaluation
postinoculation	postirradiation
postpollination	poststimulation
posttransfusion	postvaccination
romanticization	parametrization
personalization	personification
semiabstraction	septendecillion
standardization	oligomerization
overapplication	overconsumption
overcultivation	overelaboration
overexpectation	overspeculation
overstimulation	overutilization
quadruplication	radioprotection
rationalization	reaccreditation
reafforestation	reauthorization
recertification	reconcentration
reconfiguration	reconsideration
recontamination	redetermination
refortification	precancellation
preimplantation	premodification
prenotification	preregistration
procrastination	prognostication
proselytization	prussianization
regionalization	reincorporation
reinvestigation	reorchestration
reprivatization	resocialization
retroreflection	revisualization
suboptimization	suborganization
suburbanization	subvocalization
superimposition	supersaturation
supplementation	syllabification
synchronisation	synchronization
systematization	transfiguration
transliteration	transplantation
ultrafiltration	underestimation
underproduction	vascularization

Note: These 194 15-letter words that end with 'ion' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words end with tion, sion, lion, nion, rion, xion, hion, pion, gion, mion, cion, dion, vion, bion, eion, zion.

4-letter words end with 'ion' (3)
5-letter words end with 'ion' (8)
6-letter words end with 'ion' (35)
7-letter words end with 'ion' (78)
8-letter words end with 'ion' (164)
9-letter words end with 'ion' (319)
10-letter words end with 'ion' (402)
11-letter words end with 'ion' (480)
12-letter words end with 'ion' (437)
13-letter words end with 'ion' (400)
14-letter words end with 'ion' (301)
15-letter words end with 'ion' (194)