13-Letter Words Matching I___________C

There are 18 13-letter words that match I___________C. 3 are common words, such as IDIOSYNCRATIC and IMPERIALISTIC. A rarer one is IONTOPHORETIC. In this set, I is the most frequent open letter (18 words). 6 words contain a doubled letter.

Full list 18

idiosyncraticimperialisticintergalacticideogrammaticillusionisticintratelluricisoelectronicimmanentisticimmunogeneticinfraspecificinterepidemicintermetallicinterpandemicinterspecificintragalacticintraspecificintrathoraciciontophoretic

About this list

Words
18 (3 common words)
Common example
idiosyncratic
Rare example
iontophoretic
Doubled letters
6
Ending in S
0
Most frequent letter
I (18)

Questions

How many 13-letter words matching i___________c are there?

18. 3 of them are common words.

What is a common example?

IDIOSYNCRATIC is among the common words in this set.