There are a total of 161 9-letter words ending in 'ation', and the number may vary in different dictionaries. You can specify the dictionary and order.
- actuation 14
- acylation 16
- adoration 11
- adulation 13
- agflation 16
- agitation 12
- animation 14
- avocation 17
- carnation 14
- caseation 13
- cassation 13
- causation 14
- cessation 13
- chelation 16
- ciliation 14
- cognation 16
- collation 15
- cremation 16
- crenation 14
- damnation 15
- dealation 12
- deflation 15
- deviation 15
- dictation 14
- education 15
- elevation 15
- emanation 14
- emulation 15
- epilation 14
- evocation 17
- expiation 20
- exudation 19
- fellation 15
- filiation 14
- flotation 14
- foliation 14
- formation 16
- furcation 17
- gemmation 18
- gestation 12
- gradation 13
- gustation 13
- guttation 13
- hortation 12
- hydration 15
- imitation 13
- inflation 15
- isolation 11
- iteration 10
- lactation 14
- lallation 13
- laudation 13
- libration 14
- lineation 12
- liquation 21
- mediation 14
- mentation 14
- migration 15
- narration 11
- nervation 15
- nictation 14
- nitration 11
- obviation 17
- operation 13
- ovulation 16
- oxidation 18
- ozonation 20
- palmation 17
- palpation 17
- phonation 16
- pinnation 15
- placation 17
- planation 15
- plication 17
- predation 14
- privation 17
- probation 16
- pronation 14
- proration 13
- pulsation 15
- purgation 16
- quotation 20
- radiation 11
- reflation 14
- ruination 12
- saltation 11
- salvation 15
- satiation 10
- sensation 11
- septation 13
- seriation 10
- serration 10
- siltation 11
- situation 11
- solvation 15
- striation 10
- sublation 15
- summation 17
- tarnation 11
- testation 10
- titration 10
- ululation 14
- urination 12
- valuation 16
- variation 14
- vastation 14
- vernation 15
- vibration 17
- violation 15
- vitiation 14
- arcuation 11
- caudation 12
- clavation 14
- connation 11
- darnation 10
- dentation 10
- jactation 18
- nunnation 9
- peltation 11
- restation 9
- scalation 11
- sinuation 9
- sulcation 11
- sulfation 12
- vallation 12
- afflation 15
- arenation 9
- curtation 11
- curvation 14
- emication 13
- epulation 11
- epuration 11
- evagation 13
- evitation 12
- exaration 16
- exoration 16
- falcation 14
- foetation 12
- gammation 14
- grivation 13
- irisation 9
- jawbation 21
- latration 9
- luctation 11
- mactation 13
- miniation 11
- neuration 9
- pandation 12
- prelation 11
- prolation 11
- raciation 11
- reboation 11
- reptation 11
- ructation 11
- scutation 11
- sigmation 12
- sociation 11
- sortation 9
- spiration 11
- tentation 9
- vacuation 14
There are 161 9-letter words ending in ation in the well-known word game dictionary, 121 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 159 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 110 in the Words with Friends (WWF) dictionary.
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