12-Letter Words Matching ________N_A_

There are 41 12-letter words that match ________N_A_. 16 are common words, such as BICENTENNIAL and COINCIDENTAL. A rarer one is TRIPHTHONGAL. In this set, I is the most frequent open letter (33 words). 6 words contain a doubled letter.

Full list 41

Common words

bicentennialcoincidentalcompanionwaycontrapuntaldepartmentalexperimentalgovernmentalinstrumentalkleptomaniackleptomaniasmegalomaniacmegalomanias
bicentennialcoincidentalcompanionwaycontrapuntaldepartmentalexperimentalgovernmentalinstrumentalkleptomaniackleptomaniasmegalomaniacmegalomaniasnymphomaniacnymphomaniassubterraneansupplementalaniseikoniasanticolonialbibliomaniascomplementalhebephreniasimpedimentalintegumentalintracranialpleurodyniaspostcolonialquinquennialadjustmentalbibliomaniacbimillennialchimichangaschristianiasextracranialhypercapniasipecacuanhasmanagementalnoncollinearparkinsonianrhizoctoniassemicolonialtriphthongal

About this list

Words
41 (16 common words)
Common example
bicentennial
Rare example
triphthongal
Doubled letters
6
Ending in S
12
Most frequent letter
I (33)

Questions

How many 12-letter words matching ________n_a_ are there?

41. 16 of them are common words.

What is a common example?

BICENTENNIAL is among the common words in this set.