13-Letter Words Matching U________O___

There are 12 13-letter words that match U________O___. 6 are common words, such as UNCONDITIONAL and UNCONDITIONED. A rarer one is URETHROSCOPES. In this set, N is the most frequent open letter (10 words). 2 words contain a doubled letter.

Full list 12

unconditionalunconditionedunderemployedunexceptionalunintentionalunlikelihoodsunimpassionedunsensationaluntraditionalultraorthodoxultrarationalurethroscopes

About this list

Words
12 (6 common words)
Common example
unconditional
Rare example
urethroscopes
Doubled letters
2
Ending in S
2
Most frequent letter
N (10)

Questions

How many 13-letter words matching u________o___ are there?

12. 6 of them are common words.

What is a common example?

UNCONDITIONAL is among the common words in this set.