14-Letter Words Matching A___I_________

There are 19 14-letter words that match A___I_________. 5 are common words, such as AMPLIFICATIONS and ARCHIEPISCOPAL. A rarer one is AUTOINFECTIONS. In this set, I is the most frequent open letter (18 words). 5 words contain a doubled letter.

Full list 19

amplificationsarchiepiscopalarchitectonicsauspiciousnessautoimmunitiesacidificationsamphiarthrosisarchimandritesautoionizationavariciousnessacetificationsairtightnessesamphibiousnessamphiprostylesanglicizationsaperiodicitiesapolipoproteinarabicizationsautoinfections

About this list

Words
19 (5 common words)
Common example
amplifications
Rare example
autoinfections
Doubled letters
5
Ending in S
16
Most frequent letter
I (18)

Questions

How many 14-letter words matching a___i_________ are there?

19. 5 of them are common words.

What is a common example?

AMPLIFICATIONS is among the common words in this set.