12-Letter Words Matching ___I_____O__

There are 106 12-letter words that match ___I_____O__. 45 are common words, such as AFFILIATIONS and AFFIRMATIONS. A rarer one is VOCIFERATORS. In this set, S is the most frequent open letter (90 words). 20 words contain a doubled letter.

Full list 106

Common words

affiliationsaffirmationsambidextrousannihilatorsanticipatoryarbitrationsassignationscalibrationschairpersonsdelineationsdenigrationsdesiccations
affiliationsaffirmationsambidextrousannihilatorsanticipatoryarbitrationsassignationscalibrationschairpersonsdelineationsdenigrationsdesiccationsdesignationsdiminuendoesdisillusionsdisingenuousequivocatorsextirpationsfacilitatorshabituationshumiliationsimmigrationsincineratorsindigestionsindignationsindirectionsinfiltratorsinsinuationslegislationsmanipulatorsmeliorationsmucilaginousofficialdomsoscillationsoscilloscoperadiocarbonsradioisotoperesignationssatisfactorysemiprecioustitillationsunlikelihoodvacillationsvariegationsvivisectionsambiversionsantineutronsargillaceousarticulatoryassimilatorybasidiosporecapillaceouscapitulatoryconidiophoreequivocatoryfacilitatoryhemispheroidintimidatoryinvigilatorslaticiferousluminiferousmanipulatoryofficiationspacificatorypurificatoryradiobiologyresiniferoussapindaceoussemivitreoussociobiologystridulatoryvaticinatoryaltitudinousannihilatoryanticipatorsantifashionsantimonopolyantinucleonsantiquationsarticulatorsassimilatorschrismationscodirectionsexsiccationsfelicitatorsheliolatrousintimidatorsinvigoratorslaciniationslegitimatorslixiviationsmyoinositolsobliteratorspacificatorsperitrichouspreignitionspurificatorsradioecologyredigestionsredirectionsremigrationsschizogonoussemilustrousseminiferousvaticinatorsvociferators

About this list

Words
106 (45 common words)
Common example
affiliations
Rare example
vociferators
Doubled letters
20
Ending in S
82
Most frequent letter
S (90)

Questions

How many 12-letter words matching ___i_____o__ are there?

106. 45 of them are common words.

What is a common example?

AFFILIATIONS is among the common words in this set.