13-Letter Words Matching __I________I_

There are 21 13-letter words that match __I________I_. 6 are common words, such as BRINKSMANSHIP and CHIEFTAINSHIP. A rarer one is TRIPLOBLASTIC. In this set, C is the most frequent open letter (18 words). 1 words contain a doubled letter.

Full list 21

brinksmanshipchieftainshipidiosyncraticphilanthropicseismographictrigonometricanisometropialeishmaniasisoligopolisticpointillisticprincipalshipspirochetosisaminoaciduriaanisometropicepidemiologicepileptogenicprimitivisticscintigraphictriboelectrictricarboxylictriploblastic

About this list

Words
21 (6 common words)
Common example
brinksmanship
Rare example
triploblastic
Doubled letters
1
Ending in S
2
Most frequent letter
C (18)

Questions

How many 13-letter words matching __i________i_ are there?

21. 6 of them are common words.

What is a common example?

BRINKSMANSHIP is among the common words in this set.