13-Letter Words Matching ______I__O___

There are 44 13-letter words that match ______I__O___. 10 are common words, such as BACTERIOLOGIC and INQUISITIONAL. A rarer one is SUPERDIPLOMAT. In this set, I is the most frequent open letter (36 words). 4 words contain a doubled letter.

Full list 44

Common words

bacteriologicinquisitionalnonreciprocalprepositionalpropositionalpropositionedreconditionedrequisitionedunconditionalunconditionedamphidiploidsarchidiaconal
bacteriologicinquisitionalnonreciprocalprepositionalpropositionalpropositionedreconditionedrequisitionedunconditionalunconditionedamphidiploidsarchidiaconalaspergillosesaspergillosischondriosomescompositionaldispositionalmispositionedrepartitionedrequisitionersuppositionaluntraditionalacquisitionalamphidiploidybiconditionalbourguignonnedeconditionedepidemiologicethnohistorichyperhidroseshyperhidrosismicrobiologicmyelofibrosesmyelofibrosismyelofibroticneurofibromasnonantibioticovipositionalpaleobiologicphotobiologicprotohistoricradiobiologicreprovisionedsuperdiplomat

About this list

Words
44 (10 common words)
Common example
bacteriologic
Rare example
superdiplomat
Doubled letters
4
Ending in S
9
Most frequent letter
I (36)

Questions

How many 13-letter words matching ______i__o___ are there?

44. 10 of them are common words.

What is a common example?

BACTERIOLOGIC is among the common words in this set.