11-Letter Words Matching ________N_A

There are 19 11-letter words that match ________N_A. 4 are common words, such as IMPEDIMENTA and KLEPTOMANIA. A rarer one is SPERMAGONIA. In this set, I is the most frequent open letter (18 words). 3 words contain a doubled letter.

Full list 19

impedimentakleptomaniamegalomaniaaniseikoniabibliomaniachristianiacleptomaniacollectaneahebephreniahypostheniamiscellaneapleurodyniachimichangahypercapniaipecacuanhaquinquenniarhizoctoniaspermagonianymphomania

About this list

Words
19 (4 common words)
Common example
impedimenta
Rare example
spermagonia
Doubled letters
3
Ending in S
0
Most frequent letter
I (18)

Questions

How many 11-letter words matching ________n_a are there?

19. 4 of them are common words.

What is a common example?

IMPEDIMENTA is among the common words in this set.