13-Letter Words Matching A__________U_

There are 13 13-letter words that match A__________U_. 0 are common words, such as ACTINOURANIUM and ALLOCHTHONOUS. A rarer one is ARMAMENTARIUM. In this set, O is the most frequent open letter (12 words). 2 words contain a doubled letter.

Full list 13

actinouraniumallochthonousaluminiferousanticlinoriumantireligiousargentiferousargilliferousarteriovenousarundinaceousautocephalousautochthonousangiospermousarmamentarium

About this list

Words
13 (0 common words)
Common example
actinouranium
Rare example
armamentarium
Doubled letters
2
Ending in S
10
Most frequent letter
O (12)

Questions

How many 13-letter words matching a__________u_ are there?

13. 0 of them are common words.

What is a common example?

ACTINOURANIUM is among the common words in this set.