Words with 'o' as the first letter that end with 'ion'


This is a popular choice of words, to such an extent there are exactly 294 entries to choose from.

5 letter words

  • onion
  • orion

6 letter words

  • opaion
  • ophion
  • option

7 letter words

  • obelion
  • opinion
  • orarion
  • oration
  • ovation

8 letter words

  • oblation
  • oblivion
  • obtusion
  • occasion
  • occision
  • octonion
  • omission
  • ophidion
  • optation
  • orbation
  • orillion
  • ornation

9 letter words

  • obduction
  • objection
  • obreption
  • obsession
  • obtention
  • obtrusion
  • obvention
  • obversion
  • obviation
  • occlusion
  • octillion
  • offension
  • olfaction
  • operation
  • opination
  • opisthion
  • oppletion
  • orecchion
  • orpharion
  • ostension
  • ostracion
  • ovulation
  • oxidation
  • oxydation
  • oximation
  • ozonation

10 letter words

  • obduration
  • objuration
  • obligation
  • oblocution
  • obrogation
  • obsoletion
  • obturation
  • obvelation
  • obvolution
  • occupation
  • ocellation
  • ogganition
  • olympieion
  • omnivision
  • omophorion
  • oppilation
  • opposition
  • oppression
  • ordination
  • oscitation
  • osculation
  • outfiction
  • outpassion
  • outpension
  • outportion
  • outstation
  • overaction

11 letter words

  • obdormition
  • obfuscation
  • objectation
  • objurgation
  • oblectation
  • obliquation
  • oboormition
  • obscuration
  • obsecration
  • observation
  • obsignation
  • obstination
  • obstipation
  • obstriction
  • obstruction
  • obtestation
  • obumbration
  • occultation
  • odylization
  • odorization
  • oestruation
  • officiation
  • offuscation
  • oppugnation
  • oralization
  • orchestrion
  • orientation
  • origination
  • oscillation
  • ostentation
  • osteopedion
  • outquestion
  • ovalization
  • overcaution
  • overflexion
  • overtension
  • ovification
  • oviposition
  • oxidization
  • oxygenation
  • ozonization

12 letter words

  • obambulation
  • obliteration
  • obnubilation
  • obnunciation
  • obtruncation
  • opsonization
  • optimization
  • orbiculation
  • organisation
  • organization
  • ossification
  • osteopaedion
  • overdevotion
  • overdilation
  • overdilution
  • overexertion
  • overreaction
  • overreligion
  • oversedation
  • overtaxation

13 letter words

  • objectivation
  • objectization
  • obtenebration
  • octodecillion
  • octuplication
  • opacification
  • orchestration
  • orientization
  • ornamentation
  • osirification
  • ostracization
  • overaddiction
  • overagitation
  • overanimation
  • overassertion
  • overattention
  • overdiffusion
  • overeducation
  • overemulation
  • overexpansion
  • overextension
  • overimitation
  • overinflation
  • overlactation
  • overlaudation
  • overprecision
  • overprofusion
  • overprovision
  • overreduction
  • overrepletion
  • overretention
  • oversecretion
  • overvaluation
  • overvariation
  • oxygenization
  • ozonification

14 letter words

  • obstetrication
  • omentofixation
  • omniproduction
  • opsonification
  • orthoselection
  • osmoregulation
  • ottomanization
  • overabsorption
  • overaffliction
  • overassumption
  • overcoloration
  • overcorrection
  • overcorruption
  • overdecoration
  • overdedication
  • overdistension
  • overdistention
  • overdistortion
  • overestimation
  • overirrigation
  • overmodulation
  • overpersuasion
  • overpopulation
  • overproduction
  • overproportion
  • overprotection
  • overreflection
  • overregulation
  • oversaturation
  • oxidoreduction

15 letter words

  • objectification
  • officialisation
  • officialization
  • oligomerization
  • orientalization
  • outsuperstition
  • overaffirmation
  • overaggravation
  • overcalculation
  • overcompetition
  • overconsumption
  • overcontraction
  • overcultivation
  • overelaboration
  • overexplanation
  • overfrustration
  • overimportation
  • overinclination
  • overinstruction
  • overlegislation
  • overlubrication
  • overoxidization
  • overpresumption
  • overprotraction
  • overprovocation
  • overrestriction
  • overspeculation
  • overstimulation
  • overventilation

16 letter words

  • objecttification
  • overacceleration
  • overaccentuation
  • overaccumulation
  • overappreciation
  • overapprehension
  • overcivilization
  • overcommendation
  • overcompensation
  • overcondensation
  • overcontribution
  • overdeliberation
  • overdenunciation
  • overillustration
  • overmodification
  • overorganization
  • overpenalization
  • overregistration
  • oversubscription
  • overtheorization
  • overurbanization

17 letter words

  • occidentalization
  • orthogonalization
  • overbrutalization
  • overcertification
  • overconcentration
  • overconsideration
  • overdetermination
  • overgesticulation
  • overgratification
  • overmagnification
  • overmystification
  • overmodernization
  • overnormalization
  • overornamentation
  • overpreoccupation
  • overpronunciation
  • overqualification
  • overregimentation

18 letter words

  • overcapitalisation
  • overcapitalization
  • overcentralization
  • overcircumspection
  • overdiscrimination
  • overgeneralization
  • overliberalization
  • overmultiplication
  • overneutralization
  • overrepresentation
  • oversimplification
  • oversolidification
  • oversophistication
  • overspecialization

19 letter words

  • overdiversification
  • overintensification
  • overnationalization
  • overobjectification
  • overprocrastination
  • overrationalization

21 letter words

  • overcommercialization
  • overindividualization
  • overindustrialization

23 letter words

  • overintellectualization

In total, how many words is it possible to make using the combination of letters specified?
You can go with up to 294 entries.

Is there an example word from this page which might be thought of as unusual?
'Ordination' is certainly the most weird word from our list of words that start with 'o' and end with 'ion'. It means "1. The act of ordaining, appointing, or setting apart; the state of being ordained, appointed, etc. The holy and wise ordination of God. Jer. Taylor. Virtue and vice have a natural ordination to the happiness and misery of life respectively. Norris. 2. (Eccl.) The act of setting apart to...".

How many letters does the largest word on this list contain?
The largest word you could derive from this combination is 'overintellectualization', which is made up of 23 characters.

Is there a word on this page that sticks out as the most common?
The most popular word for the combination you requested is 'opinion'.

In Scrabble, what is the most points possible using this list of words beginning with 'o' and ending with 'ion'?
As there are a massive 294 entries, we would advise choosing 'ophidion' scoring 14 points overall.