15-Letter Words Matching I____________T_

There are 40 15-letter words that match I____________T_. 10 are common words, such as IMPENETRABILITY and IMPOVERISHMENTS. A rarer one is IRREPEALABILITY. In this set, I is the most frequent open letter (40 words). 16 words contain a doubled letter.

Full list 40

Common words

impenetrabilityimpoverishmentsinaccessibilityinadmissibilityincompatibilityincorrigibilityinstrumentalityintelligibilityintercollegiateinvulnerabilityimmeasurabilityimperishability
impenetrabilityimpoverishmentsinaccessibilityinadmissibilityincompatibilityincorrigibilityinstrumentalityintelligibilityintercollegiateinvulnerabilityimmeasurabilityimperishabilityimponderabilityinapplicabilityincalculabilityincomparabilityinconsolabilityincrementalistsindefensibilityindigestibilityindissolubilityinexplicabilityinextricabilityintellectualityinterminabilityirresistibilityirreversibilityindefeasibilityindefectibilityindifferentistsineffaceabilityineradicabilityintegrationistsinterfraternityintertwinementsinteruniversityintervisibilityirreformabilityirrefragabilityirrepealability

About this list

Words
40 (10 common words)
Common example
impenetrability
Rare example
irrepealability
Doubled letters
16
Ending in S
5
Most frequent letter
I (40)

Questions

How many 15-letter words matching i____________t_ are there?

40. 10 of them are common words.

What is a common example?

IMPENETRABILITY is among the common words in this set.