There are a total of 525 11-letter words ending in 'ation', and the number may vary in different dictionaries. You can specify the dictionary and order.
- abomination 19
- aborisation 15
- acceptation 21
- acclamation 22
- acclimation 22
- acetylation 18
- acidulation 18
- adumbration 20
- aestivation 16
- affectation 21
- affiliation 19
- affirmation 21
- aggradation 17
- aggravation 20
- aggregation 18
- alleviation 18
- altercation 16
- alternation 14
- ammoniation 19
- analyzation 25
- anodization 23
- antiquation 23
- appellation 20
- application 22
- approbation 21
- arbitration 15
- asportation 15
- assentation 13
- assignation 15
- association 15
- astrogation 14
- atomisation 15
- atomization 24
- attenuation 14
- attestation 12
- basestation 15
- bifurcation 22
- bombilation 22
- bombination 22
- botheration 17
- brachiation 20
- brecciation 21
- bromination 19
- calcination 20
- calculation 21
- calibration 19
- cancelation 20
- cannulation 19
- captivation 22
- carbocation 21
- carbonation 19
- carburation 19
- castigation 17
- celebration 19
- cementation 19
- cerebration 18
- chrismation 20
- circulation 20
- coagulation 19
- coarctation 18
- coeducation 20
- colligation 19
- collimation 20
- collocation 20
- colouration 17
- combination 22
- commination 22
- commutation 22
- compilation 22
- computation 22
- condonation 18
- confutation 20
- congelation 19
- conjugation 28
- conjuration 26
- connotation 17
- consolation 17
- conurbation 20
- convocation 23
- cooperation 18
- corporation 18
- correlation 16
- corrugation 18
- cortication 18
- coruscation 19
- covariation 19
- crenelation 17
- crenulation 18
- crepitation 18
- crimination 19
- culmination 21
- cultivation 21
- cupellation 21
- cuspidation 20
- cybernation 21
- cyclisation 21
- cyclization 30
- deamination 17
- debarkation 20
- decantation 17
- declamation 20
- declaration 17
- declination 18
- decollation 18
- decussation 17
- defaecation 19
- defalcation 20
- defloration 17
- defoliation 17
- deformation 19
- degradation 16
- degustation 16
- dehydration 18
- deification 19
- delectation 17
- delineation 15
- demarcation 19
- denervation 18
- denigration 16
- deoxidation 21
- deportation 16
- depravation 20
- deprecation 19
- depredation 17
- deprivation 20
- desecration 16
- desiccation 19
- designation 16
- desperation 16
- destination 14
- detestation 13
- deuteration 14
- devaluation 19
- devastation 17
- dimidiation 17
- discreation 16
- dislocation 17
- disputation 17
- disrelation 14
- dissipation 16
- divulgation 21
- duplication 21
- edification 19
- ejaculation 26
- elaboration 16
- elicitation 16
- elimination 17
- elucidation 18
- elutriation 14
- embarkation 22
- embrocation 21
- enamoration 16
- encystation 18
- enucleation 18
- enumeration 17
- enunciation 18
- epoxidation 23
- eradication 16
- erotization 21
- evagination 19
- evaporation 19
- eventuation 18
- examination 23
- exclamation 26
- excoriation 22
- exculpation 27
- exfoliation 23
- exhortation 21
- exoneration 20
- expatiation 22
- expectation 25
- explanation 24
- explication 26
- exploration 23
- exportation 22
- expurgation 25
- exsiccation 25
- extenuation 21
- extirpation 22
- extrication 22
- fabrication 21
- fascination 19
- fecundation 21
- fimbriation 21
- firestation 15
- fluctuation 21
- fomentation 19
- forestation 15
- formication 21
- formulation 20
- fornication 19
- frustration 16
- fulguration 20
- fulmination 21
- fustigation 18
- gemmulation 22
- geolocation 18
- germination 18
- granulation 17
- gratulation 16
- gravitation 18
- habituation 18
- hibernation 18
- humiliation 19
- hyphenation 22
- idolisation 14
- idolization 23
- illuviation 19
- imagination 18
- imbrication 21
- immigration 20
- impartation 18
- impetration 18
- implication 22
- imploration 19
- importation 18
- imprecation 21
- incantation 17
- incarnation 17
- incensation 17
- inclination 18
- inculcation 21
- inculpation 21
- incurvation 21
- indentation 15
- indignation 17
- inebriation 16
- infatuation 17
- infestation 16
- information 19
- infuriation 17
- innervation 18
- inoculation 18
- insinuation 15
- inspiration 16
- instigation 15
- integration 15
- irradiation 13
- itemisation 15
- itemization 24
- itineration 13
- jactitation 24
- jumpstation 28
- laciniation 17
- lacrimation 19
- lacrymation 21
- laicisation 16
- laicization 25
- lamentation 17
- legislation 16
- lionisation 14
- lionization 23
- liquidation 24
- lixiviation 24
- lubrication 20
- lucubration 21
- machination 21
- manducation 21
- margination 18
- mastication 18
- melioration 16
- mensuration 17
- mercuration 19
- methanation 18
- methylation 20
- metrication 18
- miscitation 18
- miscreation 18
- mislocation 19
- molestation 16
- multination 18
- murmuration 20
- myelination 19
- negotiation 15
- neurulation 16
- nitridation 14
- obfuscation 22
- objurgation 27
- obscuration 19
- obsecration 18
- observation 19
- obstipation 18
- occultation 20
- officiation 21
- orientation 13
- origination 15
- oscillation 17
- ostentation 13
- oxidisation 20
- oxidization 29
- oxygenation 24
- ozonisation 22
- ozonization 31
- paedication 19
- palpitation 19
- passivation 19
- pectination 19
- penetration 16
- percolation 19
- perennation 17
- perforation 18
- permutation 19
- personation 16
- pixellation 24
- pixillation 24
- pollination 18
- ponderation 17
- postulation 17
- predication 19
- prefixation 25
- prelibation 19
- preparation 18
- procreation 18
- procuration 19
- profanation 19
- propagation 20
- prorogation 17
- prostration 15
- protonation 16
- provocation 22
- proximation 25
- publication 23
- pullulation 20
- punctuation 21
- pustulation 18
- realisation 13
- realization 22
- reanimation 16
- recantation 16
- reclamation 19
- recordation 16
- reeducation 17
- reformation 18
- rehydration 17
- reification 18
- reinflation 17
- reiteration 12
- reluctation 17
- remediation 16
- remigration 17
- reoperation 15
- reoxidation 20
- replication 19
- reprobation 18
- repudiation 17
- reradiation 13
- reservation 16
- resignation 15
- respiration 15
- restoration 12
- retaliation 13
- retardation 13
- revaluation 18
- rubrication 19
- rustication 16
- sacculation 20
- segregation 16
- solmisation 16
- solmization 25
- speculation 20
- spiculation 20
- sporulation 17
- stagflation 18
- stimulation 17
- stipulation 17
- stylisation 15
- stylization 24
- subjugation 28
- sublimation 20
- subluxation 25
- subornation 17
- subrogation 18
- sufferation 19
- suffixation 26
- suffocation 22
- sulfonation 18
- sulfuration 18
- supernation 17
- suppuration 20
- suspiration 16
- susurration 14
- syncopation 21
- syndication 19
- termination 16
- tesselation 13
- titillation 14
- translation 14
- trepanation 16
- trepidation 16
- tribulation 17
- trituration 13
- unification 20
- unitization 23
- utilisation 14
- utilization 23
- vaccination 23
- vacillation 21
- vacuolation 21
- variegation 18
- ventilation 18
- vermination 20
- vindication 21
- workstation 19
- ablactation 15
- acumination 15
- aerostation 11
- affrication 19
- allineation 11
- alveolation 14
- analysation 14
- anodisation 12
- apocopation 17
- arabisation 13
- arabization 22
- arrestation 11
- aspergation 14
- bioaeration 13
- bisociation 15
- canceration 15
- capsulation 15
- cavillation 16
- chorisation 16
- chorization 25
- coadunation 14
- compotation 17
- cyanidation 17
- debarcation 16
- decurvation 17
- defiliation 15
- dehortation 15
- demarkation 18
- demigration 15
- denitration 12
- deploration 14
- deplumation 16
- despumation 16
- dialysation 15
- dialyzation 24
- dismutation 14
- dockisation 18
- dockization 27
- embarcation 17
- enquiration 20
- erotisation 11
- eventration 14
- exanimation 20
- excarnation 20
- expiscation 22
- expugnation 21
- fertigation 15
- festination 14
- flagitation 15
- flustration 14
- forcipation 18
- fructuation 16
- fusillation 14
- glomeration 14
- gubernation 14
- gurgitation 13
- hariolation 14
- humectation 18
- illiquation 20
- imparkation 19
- impastation 15
- improbation 17
- impugnation 16
- inanimation 13
- incremation 15
- infeudation 15
- inquination 20
- inquiration 20
- inusitation 11
- iridisation 12
- iridization 21
- kyanisation 18
- kyanization 27
- lamellation 13
- lancination 13
- luxuriation 18
- mamillation 15
- mancipation 17
- misrelation 13
- mucronation 15
- musculation 15
- mussitation 13
- mutteration 13
- nervuration 14
- nictitation 13
- nitrosation 11
- nummulation 15
- nuncupation 15
- obliquation 22
- obsignation 14
- obtestation 13
- obumbration 17
- pectisation 15
- pectization 24
- peptisation 15
- peptization 24
- perduration 14
- pignoration 14
- pulveration 16
- reclination 13
- reinstation 11
- saburration 13
- serrulation 11
- sigillation 12
- subarration 13
- subpanation 15
- surrogation 12
- suscitation 13
- terebration 13
- tittivation 14
- tostication 13
- turbination 13
- unitisation 11
- upgradation 15
- upvaluation 16
- variolation 14
- vellication 16
- venditation 15
- verberation 16
- vexillation 21
- villication 16
- vulneration 14
There are 525 11-letter words ending in ation in the well-known word game dictionary, 354 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 507 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 403 in the Words with Friends (WWF) dictionary.
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