15-Letter Words Matching I___S__________

There are 21 15-letter words that match I___S__________. 6 are common words, such as ILLUSTRIOUSNESS and IMPASSIBILITIES. A rarer one is IONOSPHERICALLY. In this set, I is the most frequent open letter (20 words). 16 words contain a doubled letter.

Full list 21

illustriousnessimpassibilitiesimpassivenessesimpossibilitiesindustrializingindustriousnessincessantnessesindissolubilityintussusceptionirresistibilityimmiscibilitiesimpassabilitiesindisciplinableindustrialisinginfusiblenessesinhospitalitiesintussusceptingintussusceptiveinvestigationalinvisiblenessesionospherically

About this list

Words
21 (6 common words)
Common example
illustriousness
Rare example
ionospherically
Doubled letters
16
Ending in S
11
Most frequent letter
I (20)

Questions

How many 15-letter words matching i___s__________ are there?

21. 6 of them are common words.

What is a common example?

ILLUSTRIOUSNESS is among the common words in this set.