13-Letter Words Matching ____I___G____

There are 19 13-letter words that match ____I___G____. 5 are common words, such as BILLINGSGATES and CARDIOLOGISTS. A rarer one is PREBIOLOGICAL. 5 words contain a doubled letter.

Full list 19

billingsgatescardiologistscunnilingusesphysiologicalphysiologistscardiologicalglaciologicalglaciologistsbibliopegistsconfidingnessexobiologicalexobiologistsfestivalgoersforgivingnessnonbiologicalnonbiologistspettifoggingspostinauguralprebiological

About this list

Words
19 (5 common words)
Common example
billingsgates
Rare example
prebiological
Doubled letters
5
Ending in S
12

Questions

How many 13-letter words matching ____i___g____ are there?

19. 5 of them are common words.

What is a common example?

BILLINGSGATES is among the common words in this set.