12-Letter Words Matching ________AI__

There are 15 12-letter words that match ________AI__. 8 are common words, such as CHAMBERLAINS and CHAMBERMAIDS. A rarer one is UNCONSTRAINT. In this set, S is the most frequent open letter (13 words). 5 words contain a doubled letter.

Full list 15

chamberlainschambermaidscountervailsdemimondainelegerdemainsmillionnairerattlebrainsswallowtailsbristletailscounterraidsinterstrainsoverexplainsphotomosaicsscissortailsunconstraint

About this list

Words
15 (8 common words)
Common example
chamberlains
Rare example
unconstraint
Doubled letters
5
Ending in S
12
Most frequent letter
S (13)

Questions

How many 12-letter words matching ________ai__ are there?

15. 8 of them are common words.

What is a common example?

CHAMBERLAINS is among the common words in this set.