12-Letter Words Containing NAI

There are 12 12-letter words that contain NAI. 8 are common words, such as BILLIONAIRES and DEBONAIRNESS. A rarer one is ZILLIONAIRES. 8 words contain a doubled letter.

Full list 12

billionairesdebonairnessdoctrinaireslegionnairesmillionairesmillionnairerenaissancesvinaigrettesjaponaiseriepleinairismspleinairistszillionaires

About this list

Words
12 (8 common words)
Common example
billionaires
Rare example
zillionaires
Doubled letters
8
Ending in S
10

Questions

How many 12-letter words containing nai are there?

12. 8 of them are common words.

What is a common example?

BILLIONAIRES is among the common words in this set.