11-Letter Words Matching ____A___U__

There are 12 11-letter words that match ____A___U__. 1 are common words, such as INGRATITUDE and ACETABULUMS. A rarer one is ULTRAVACUUM. In this set, S is the most frequent open letter (9 words). 1 words contain a doubled letter.

Full list 12

ingratitudeacetabulumsmyocardiumspanjandrumscockalorumscotransducemidlatitudemystagoguesprocambiumssialagoguesultracasualultravacuum

About this list

Words
12 (1 common words)
Common example
ingratitude
Rare example
ultravacuum
Doubled letters
1
Ending in S
7
Most frequent letter
S (9)

Questions

How many 11-letter words matching ____a___u__ are there?

12. 1 of them are common words.

What is a common example?

INGRATITUDE is among the common words in this set.