15-Letter Words Matching ___IL__________

There are 13 15-letter words that match ___IL__________. 5 are common words, such as DISILLUSIONMENT and FAMILIARIZATION. A rarer one is SEMILOGARITHMIC. In this set, I is the most frequent open letter (12 words). 6 words contain a doubled letter.

Full list 13

disillusionmentfamiliarizationpusillanimitiespusillanimouslyunwillingnessesantiliberalismsantilibertarianantilogarithmicavailablenessescivilianizationfutilitarianismoscillographiessemilogarithmic

About this list

Words
13 (5 common words)
Common example
disillusionment
Rare example
semilogarithmic
Doubled letters
6
Ending in S
5
Most frequent letter
I (12)

Questions

How many 15-letter words matching ___il__________ are there?

13. 5 of them are common words.

What is a common example?

DISILLUSIONMENT is among the common words in this set.