13-Letter Words Matching ________IO___

There are 115 13-letter words that match ________IO___. 32 are common words, such as BIDIRECTIONAL and COEDUCATIONAL. A rarer one is ULTRARATIONAL. In this set, N is the most frequent open letter (112 words). 21 words contain a doubled letter.

Full list 115

Common words

bidirectionalcoeducationalcomputationalcongressionaldisillusioneddysfunctionalgravitationalinformationalinquisitionalinspirationalinstitutionalinstructional
bidirectionalcoeducationalcomputationalcongressionaldisillusioneddysfunctionalgravitationalinformationalinquisitionalinspirationalinstitutionalinstructionalinternationalmalfunctionedmultinationalnonfunctionalnonvocationalobservationaloveremotionalprepositionalpropositionalpropositionedreapportionedreconditionedrequisitionedsupranationaltransnationalunconditionalunconditionedunexceptionalunintentionalvivisectionalassociationalcompositionalcompressionalconfutationalconjugationalconjunctionalconnotationalconvocationalcorrelationaldeclinationaldispositionalendometriosesendometriosisexaminationalexpectationalimplicationalincantationalinscriptionalmetafictionalmispositionedorientationalpermutationalprocreationalquadrillionthquintillionthreformationalrepartitionedrequisitionersupernationalsuppositionaltransactionaltranslationalunimpassionedunsensationaluntraditionalabstractionalacquisitionalaggregationalarbitrationalattributionalbiconditionalcalculationalcollocationalcombinationalcontractionaldeconditioneddeformationaldisfunctionalendosymbiontsendosymbiosesendosymbiosisendosymbioticendotheliomasexplorationalfluctuationalhyperrationalimmigrationalinclinationalinteractionalinterregionalmesotheliomasmisfunctionedmultiregionalnonantibioticnonbehavioraloscillationalovercautionedovipositionalphotoperiodicposttensionedpostulationalpreganglionicprevocationalprogressionalquasiperiodicrarefactionalreprovisionedseptentrionalsuperregionalsuprarationalterminationaltransfusionalultrarational

About this list

Words
115 (32 common words)
Common example
bidirectional
Rare example
ultrarational
Doubled letters
21
Ending in S
7
Most frequent letter
N (112)

Questions

How many 13-letter words matching ________io___ are there?

115. 32 of them are common words.

What is a common example?

BIDIRECTIONAL is among the common words in this set.