12-Letter Words Matching ______I__O__

There are 99 12-letter words that match ______I__O__. 37 are common words, such as ACQUISITIONS and ADVENTITIOUS. A rarer one is UNFASTIDIOUS. In this set, S is the most frequent open letter (77 words). 11 words contain a doubled letter.

Full list 99

Common words

acquisitionsadventitiousappreciatorsappreciatorybacteriologycalumniatorscompetitionscompositionsconciliatorsconciliatoryconstrictorscrucifixions
acquisitionsadventitiousappreciatorsappreciatorybacteriologycalumniatorscompetitionscompositionsconciliatorsconciliatoryconstrictorscrucifixionsdispositionsepidemiologyextraditionsimprecisionsinauspiciousinquisitionsmeretriciousmicrobiologymountaintopsnonreligiousparturitionspeccadilloespremonitionsprepositionsprohibitionspropitiatorypropositionsrecognitionsreconditionsrequisitionssubdivisionssupercilioussupervisionssuppositionsunpropitiousadscititiousamphidiploidannunciatorsastrobiologybranchiopodschondriosomedeglutitionsdenunciatorydepreciatorsdepreciatoryecclesiologyenchiridionsingratiatoryinterdictorymalpositionsmicturitionsmillimicronsneurobiologynonmaliciousonomasiologypaleobiologyphytobiologypreteritionsprotohistoryradiobiologyrenunciatorysociobiologysuppositioustranspicuousunsuspiciousabbreviatorsannunciatorybipartitionscementitiouschylomicronsdeconditionsethnohistoryhydrobiologyinterdictorsliturgiologymicrovillousmisdivisionsmispositionsneurofibromanonambiguousnondecisionsovipositionspathobiologyperitrichousphotobiologypolystichouspotentiatorspreignitionspremunitionspropitiatorsrepartitionsreprovisionssubauditionssubdecisionssubmunitionstransfixionsunfastidious

About this list

Words
99 (37 common words)
Common example
acquisitions
Rare example
unfastidious
Doubled letters
11
Ending in S
70
Most frequent letter
S (77)

Questions

How many 12-letter words matching ______i__o__ are there?

99. 37 of them are common words.

What is a common example?

ACQUISITIONS is among the common words in this set.