tion sion ssion cian /shun/ usually /zhun/ but not always /shun/ /shun/
590 62 39 12
alphabetical order
verb ends split digraph + <d> = /zhun/
<d> by itself = /shun/ verb ends <ss>
jobs
abbreviation abrade abrasion aggress aggression beautician
abduction allude allusion compress compression dietician
abolit ion coll ide coll ision concuss concussion electrician
abortion collude collusion confess confession magician
absorption conclude conclusion depress depression mathematician
abstention corrode corrosion discuss discussion musician
abstract ion decide decision express expression obstetrician
accelerat ion delude delusion impress impression optician
accommodation divide divis ion obsess obsession paediatrician
accreditation i l lude (old) disi l lusion oppress oppression physician
accumulation erode erosion percuss percussion polit ician
accusation evade evasion possession possession technician
acidif ication exclude exclusion profess profession
acquisit ion explode explosion progress progression cion
action i l lude (old) i l lusion regress regression 2
activation include inclusion repossess repossession coercion
adaptation (in)decide indecision repress repression suspicion
addiction intrude intrusion suppress suppression
addition invade invasion transgress transgression
adjudication persuade persuasion verb ends cede/ceed Odd Ones
administration provide provision accede accession shion
admiration subdivide subdivision concede concession 2
admonition apprehend apprehension proceed procession cushion
adoption comprehend comprehension recede recession fashion
adoration expand expansion secede secession
affectation pretend pretension succeed succession xion
affection suspend suspension 2
aff i l iation root ends /s/ or /z/ - no vowel added verb ends <mit> complexion
affirmation confuse confusion admit admission crucif ixion
affl iction diffuse diffusion commit commission
aggravation disperse dispersion emit emission
aggregation fuse fusion omit omission
agitation hypertense hypertension remit remission
alienation immerse immersion submit submission
allegation infuse infusion transmit transmission
allocation precise precision mission
alteration revise revision
altercation supervise supervision No obvious pattern
amalgamation televise television passion compassion
ambition tense tension session
ammunition transfuse transfusion
amplif ication vis ion
animation root ends /vert/
anticipation avert aversion
applicat ion convert conversion
apportion divert diversion
appreciat ion invert inversion
appropriation revert reversion
approximation subvert subversion
arbitration version
articulation root ends /l/ or /r/ - no vowel added
aspiration adhere adhesion
assassination cohere cohesion
assert ion compel compulsion
assimilat ion expel expulsion
association incur incursion
assumption excursion
attention No obvious pattern
attraction dimension occasion
attribution emulsion pension
auction lesion revulsion
audition
authorisation
automation
aviation
bastion
calculation
calibration
cancellation
caption
carnation
causation
caution
celebrat ion
certif ication
cessation
characterisation
circulation
citation
civil isation
civil isation
clar if ication
classif ication
coal it ion
collaboration
collection
collocation
combination
combustion
commotion
communication
compensation
competition
compilation
completion
complication
composition
computation
concentrat ion
conception
conci l iation
condemnation
condensation
condition
confederation
configurat ion
confirmation
confiscation
conformation
confrontation
congestion
congregation
conjunction
connection
connotation
conscription
conservation
consideration
consolation
consol idation
constel lation
constipation
constitution
construction
consultation
consumption
contamination
contemplation
contention
continuation
contraception
contract ion
contradiction
contravention
contribution
conurbation
convention
conversation
conviction
convocation
co-operation
coordination
coronation
corporation
correction
correlation
corruption
creation
cremation
culmination
cultivation
decentralisation
deception
declaration
decomposition
decoration
dedication
deduction
defamation
defection
definit ion
deforestation
deformation
degradation
delegation
deletion
deliberation
demarcat ion
demolit ion
demonstration
denomination
denunciation
depiction
depletion
deportation
deposition
depreciation
deprivation
deregulation
derivation
description
desertion
designation
desolation
desperation
destination
destruction
detection
detention
deterioration
determination
devaluation
devastation
deviation
devolution
devotion
differentiation
digestion
dilution
diminution
direction
discretion
discr imination
disintegration
dislocation
dispensation
disposition
disqualif ication
disruption
dissatisfaction
dissemination
dissertat ion
dissociation
dissolution
distinction
distortion
distraction
distribution
diversif ication
documentation
domination
donation
duplication
duration
edition
education
elaboration
elation
election
elevation
el imination
emancipation
emigrat ion
emotion
emulation
equation
eradication
erection
eruption
escalation
estimation
evacuation
evaluation
eviction
evolution
exaggeration
examination
exasperation
excavation
exception
excitation
exclamation
excretion
execution
exemption
exertion
exhaustion
exhibition
exhortation
expectat ion
expedition
experimentation
explanation
exploitation
explorat ion
exposit ion
extinction
extraction
extradition
fabrication
faction
fascination
federation
f iction
f i ltration
f ixation
f lotation
f luctuation
formation
formulation
fortif ication
foundation
fraction
fragmentation
friction
frustration
function
generalisation
generalisation
generation
gestation
graduation
gratif ication
habitation
hallucination
hesitation
humiliation
hybridisation
identif ication
ignition
i l lumination
i l lustrat ion
imagination
imitation
immigration
imperfection
implementation
implication
importation
imposition
improvisation
inauguration
incarnation
inception
inclinat ion
incorporat ion
incubation
indication
indignation
induction
industrialisation
infarction
infection
infi ltration
inflammation
inflation
information
ingestion
inhibition
init iation
injection
injunction
innovation
inquisit ion
inscription
insertion
inspection
inspiration
installat ion
institution
instruction
instrumentation
insulation
insurrection
integration
intensif ication
intention
interaction
interception
interconnection
interpretation
interrogation
interruption
intersect ion
intervention
intimidation
intonation
introduction
intuition
invention
investigation
invitation
irradiation
irrigation
irritation
isolation
iteration
junction
jurisdiction
justif ication
juxtaposition
legislation
l iberation
l imitation
l iquidation
l it igation
location
lotion
magnification
manifestation
manipulation
maturation
mediation
medication
meditation
mention
migration
misconception
misrepresentation
mobilisation
moderation
modernisation
modernisation
modificat ion
modulation
motion
motivation
multiplication
mutation
nation
nationalisation
navigation
negation
negotiation
nomination
notation
notif ication
notion
nutrit ion
objection
obligation
observat ion
obstruction
occupation
operation
opposition
option
ordination
organisation
organisation
orientation
osci l lation
ovation
oxidation
participat ion
partit ion
penetration
perception
perfection
persecution
petit ion
plantation
polarisation
pollution
population
portion
position
potion
precaution
precipitation
precondition
prediction
preoccupation
preparation
prescription
presentation
preservation
presumption
presupposition
prevention
privatisation
probation
proclamation
production
prohibition
projection
proliferation
promotion
pronunciation
propagation
proportion
proposition
prosecution
prostitution
protection
provocation
publication
punctuation
purif ication
qualif ication
quantif ication
question
quotation
radiation
ratif ication
ration
rationalisation
reaction
realisation
reception
reclamation
recognition
recol lection
recommendation
reconcil iation
reconstruction
recreation
recrimination
rectif ication
redemption
redistribution
reduction
reflection
reformation
regeneration
registration
regulation
rehabilitation
rejection
relation
relaxation
relegation
relocation
remuneration
renovation
renunciation
reorganisation
reparation
repatriation
repetit ion
replication
representation
reproduction
reputation
resect ion
reservation
resignation
resolution
restitution
restoration
restriction
resumption
resurrection
retaliation
retention
retribution
reunification
revaluat ion
revelat ion
revolution
rotation
salvation
sanction
satisfaction
saturation
secret ion
section
seduction
segmentation
segregation
selection
sensation
separation
simplif icat ion
simulation
situation
solution
sophistication
specialisation
specialisation
specif ication
speculat ion
starvat ion
station
st imulation
st ipulation
stratif ication
subordination
subscription
subsection
substitution
suggestion
superstit ion
supposition
taxation
telecommunication
temptation
termination
traction
tradition
transact ion
transcription
transformation
transition
translation
transplantation
transportation
tuit ion
ulceration
unif ication
vacation
vaccinat ion
validat ion
valuation
variat ion
vegetation
ventilation
verif ication
vibration
violat ion
vocat ion
westernisation
workstat ion