15-Letter Words Matching ______I______A_

There are 31 15-letter words that match ______I______A_. 4 are common words, such as BACTERIOLOGICAL and IMPROVISATIONAL. A rarer one is TRANSPIRATIONAL. In this set, L is the most frequent open letter (31 words). 5 words contain a doubled letter.

Full list 31

Common words

bacteriologicalimprovisationalintelligentsiasmicrobiologicalcommunicationalepidemiologicalhallucinationalimprovisatorialisoperimetricalnonagriculturalpreagriculturalsociobiological
bacteriologicalimprovisationalintelligentsiasmicrobiologicalcommunicationalepidemiologicalhallucinationalimprovisatorialisoperimetricalnonagriculturalpreagriculturalsociobiologicalanticlimacticalecclesiologicalethnohistoricalhydrobiologicalhyperlipidemiasinterdivisionalinvestigationalmultidivisionalmultimillennialneurobiologicalpaleobiologicalparticipationalphotobiologicalradiobiologicalrecombinationalsociohistoricaltelangiectasiastranshistoricaltranspirational

About this list

Words
31 (4 common words)
Common example
bacteriological
Rare example
transpirational
Doubled letters
5
Ending in S
3
Most frequent letter
L (31)

Questions

How many 15-letter words matching ______i______a_ are there?

31. 4 of them are common words.

What is a common example?

BACTERIOLOGICAL is among the common words in this set.