Countable Nouns That Start with I and End with ION

Explore 335 verified English countable nouns starting with I and ending with ION, including Information, Institution, Investigation, Interaction, Innovation, Introduction and Imagination. Sort these count nouns with singular and plural forms by word length for ESL grammar practice, determiner usage, and plural spelling below, or review singular and plural count rules in our noun grammar guide.

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Starts with ID4 words
identification
idealization
ideation
idolization
Starts with IG
2 words
ignition
ignoration
Starts with IL10 words
illustration
illusion
illumination
illegalization
illocution
illation
illegitimation
illuviation
illision
illaqueation
Starts with IM24 words
imagination
impression
implication
implementation
imitation
immersion
immunization
imperfection
improvisation
impersonation
imposition
implantation
implosion
importation
immobilization
imprecision
imputation
immolation
immortalization
impregnation
impartation
impaction
imprecation
impulsion
Starts with IN24 words
information
institution
investigation
interaction
innovation
introduction
inflation
interpretation
integration
intervention
instruction
infection
intention
invention
inspiration
invitation
inclusion
installation
invasion
inspection
indication
injection
intersection
intuition
Starts with IO5 words
ion
ionization
iodization
iodination
iodation
Starts with IP
1 words
ipheion
Starts with IR12 words
irrigation
irritation
irradiation
irruption
irreduction
irrelation
irrision
irreconciliation
iridization
irremission
irrecognition
irisation
Starts with IS4 words
isolation
isomerization
isoimmunization
isoagglutination
Starts with IT4 words
iteration
itemization
italicization
itineration
Starts with IX
1 words
ixiolirion

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