9-Letter Words Containing UOU

There are 17 9-letter words that contain UOU. 13 are common words, such as AMBIGUOUS and ARDUOUSLY. A rarer one is SINUOUSLY. In this set, S is the most frequent open letter (17 words). 3 words contain a doubled letter.

Full list 17

ambiguousarduouslyassiduouscongruousdeciduousfatuouslyimpetuousingenuousinnocuousstrenuoussumptuoustenuouslyvacuouslyfructuousirriguousnocuouslysinuously

About this list

Words
17 (13 common words)
Common example
ambiguous
Rare example
sinuously
Doubled letters
3
Ending in S
11
Most frequent letter
S (17)

Questions

How many 9-letter words containing uou are there?

17. 13 of them are common words.

What is a common example?

AMBIGUOUS is among the common words in this set.