Comuns:
* action
* addition
* ambition
* attention
* condition
* connection
* creation
* decision
* definition
* direction
* education
* emotion
* explanation
* fiction
* function
* generation
* information
* instruction
* invention
* location
* nation
* opinion
* permission
* population
* position
* production
* protection
* question
* reaction
* relation
* religion
* solution
* station
* suggestion
* tradition
* translation
Menos comuns:
* abrasion
* adhesion
* alienation
* allusion
* ascension
* assertion
* association
* audition
* aversion
* collision
* combustion
* confusion
* corrosion
* delusion
* digestion
* dimension
* division
* erosion
* explosion
* extension
* friction
* fusion
* illusion
* immersion
* intrusion
* invasion
* mission
* omission
* provision
* revision
* secession
* suspicion
* tension
* vision
*
Existem muitas outras palavras que terminam em "-ion", mas esta é uma boa seleção para começar. Espero que seja útil!