13-Letter Words Matching __A________U_

There are 12 13-letter words that match __A________U_. 2 are common words, such as PLATITUDINOUS and UNADVENTUROUS. A rarer one is GRANULOMATOUS. 1 words contain a doubled letter.

Full list 12

platitudinousunadventurousbrachiosaurusbrachypterouscrassulaceousfractocumulusfractostratusgraminivorousquartziferousdiathermanousexanthematousgranulomatous

About this list

Words
12 (2 common words)
Common example
platitudinous
Rare example
granulomatous
Doubled letters
1
Ending in S
12

Questions

How many 13-letter words matching __a________u_ are there?

12. 2 of them are common words.

What is a common example?

PLATITUDINOUS is among the common words in this set.