11-Letter Words Matching I________I_

There are 23 11-letter words that match I________I_. 4 are common words, such as IMMUNOLOGIC and INAUTHENTIC. A rarer one is ISOELECTRIC. In this set, C is the most frequent open letter (19 words). 7 words contain a doubled letter.

Full list 23

immunologicinauthenticinterleukinionosphericichthyornisiconostasisideographicidioglossiaidiographicidiomorphicimmunogenicinteratomicinternunciointervallicisomagneticisometropiaithyphallicideogrammicidioblasticinterethnicinterstrainisallobaricisoelectric

About this list

Words
23 (4 common words)
Common example
immunologic
Rare example
isoelectric
Doubled letters
7
Ending in S
2
Most frequent letter
C (19)

Questions

How many 11-letter words matching i________i_ are there?

23. 4 of them are common words.

What is a common example?

IMMUNOLOGIC is among the common words in this set.