15-Letter Words Matching I________T_____

There are 28 15-letter words that match I________T_____. 8 are common words, such as IMPROVISATIONAL and INSTRUMENTALIST. A rarer one is INVESTIGATIONAL. In this set, N is the most frequent open letter (26 words). 8 words contain a doubled letter.

Full list 28

Common words

improvisationalinstrumentalistinstrumentalityinstrumentationinsubstantiallyinterrogativelyinterrogatoriesintrospectivelyimportunatenessimprovisatorialinstrumentalismintemperateness
improvisationalinstrumentalistinstrumentalityinstrumentationinsubstantiallyinterrogativelyinterrogatoriesintrospectivelyimportunatenessimprovisatorialinstrumentalismintemperatenessinterpenetratedinterpenetratesinterrogationalinterrogatorilyinterstratifiedinterstratifiesisoperimetricalimmunoblottingsinterdigitatinginterdigitationinterelectrodesinterelectronicintervisitationintraperitonealintrospectionalinvestigational

About this list

Words
28 (8 common words)
Common example
improvisational
Rare example
investigational
Doubled letters
8
Ending in S
7
Most frequent letter
N (26)

Questions

How many 15-letter words matching i________t_____ are there?

28. 8 of them are common words.

What is a common example?

IMPROVISATIONAL is among the common words in this set.