13-Letter Words Matching _____I____A__

There are 20 13-letter words that match _____I____A__. 6 are common words, such as COMPLIMENTARY and EXPEDITIONARY. A rarer one is SUBPRINCIPALS. In this set, N is the most frequent open letter (19 words). 3 words contain a doubled letter.

Full list 20

complimentaryexpeditionaryhumanitariansnonspiritualstotalitariansveterinariansaneroidographequalitariansimparipinnatemajoritarianstransitionaryantediluviansantibillboardfutilitarianshereditarianshypopituitarynonuniversalspenicillinasepostdiluvianssubprincipals

About this list

Words
20 (6 common words)
Common example
complimentary
Rare example
subprincipals
Doubled letters
3
Ending in S
12
Most frequent letter
N (19)

Questions

How many 13-letter words matching _____i____a__ are there?

20. 6 of them are common words.

What is a common example?

COMPLIMENTARY is among the common words in this set.