8-Letter Words Matching _I_____O

There are 16 8-letter words that match _I_____O. 5 are common words, such as CILANTRO and HITHERTO. A rarer one is VINDALOO. In this set, I is the most frequent open letter (8 words). 5 words contain a doubled letter.

Full list 16

cilantrohithertolibrettopimientovirtuosocicisbeocioppinofinochiolibecciomicromhoritenutovitiligomilesimomillimhovigorosovindaloo

About this list

Words
16 (5 common words)
Common example
cilantro
Rare example
vindaloo
Doubled letters
5
Ending in S
0
Most frequent letter
I (8)

Questions

How many 8-letter words matching _i_____o are there?

16. 5 of them are common words.

What is a common example?

CILANTRO is among the common words in this set.