15-Letter Words Matching ___A_____I_____

There are 18 15-letter words that match ___A_____I_____. 2 are common words, such as HUMANITARIANISM and TOTALITARIANISM. A rarer one is UNCATEGORIZABLE. In this set, A is the most frequent open letter (17 words). 9 words contain a doubled letter.

Full list 18

humanitarianismtotalitarianismcataclysmicallylogarithmicallymelancholicallymetalinguisticsdisaccharidasesequalitarianismhemagglutinatedhemagglutinatesmetallurgicallymetamorphicallyparageneticallyparalinguisticsparamyxovirusespararosanilinestotalitarianizeuncategorizable

About this list

Words
18 (2 common words)
Common example
humanitarianism
Rare example
uncategorizable
Doubled letters
9
Ending in S
6
Most frequent letter
A (17)

Questions

How many 15-letter words matching ___a_____i_____ are there?

18. 2 of them are common words.

What is a common example?

HUMANITARIANISM is among the common words in this set.