9-Letter Words Matching _____C_U_

There are 12 9-letter words that match _____C_U_. 2 are common words, such as AMERICIUM and NIGHTCLUB. A rarer one is SUPERCLUB. In this set, I is the most frequent open letter (10 words). 0 words contain a doubled letter.

Full list 12

americiumnightclubautoicousgynaeceumgynoeciummonoicousparoicousposticousgynaeciuminterclublubricoussuperclub

About this list

Words
12 (2 common words)
Common example
americium
Rare example
superclub
Doubled letters
0
Ending in S
5
Most frequent letter
I (10)

Questions

How many 9-letter words matching _____c_u_ are there?

12. 2 of them are common words.

What is a common example?

AMERICIUM is among the common words in this set.