12-Letter Words Matching V________O__

There are 20 12-letter words that match V________O__. 8 are common words, such as VACCINATIONS and VACILLATIONS. A rarer one is VOCIFERATORS. 4 words contain a doubled letter.

Full list 20

vaccinationsvacillationsvaingloriousvaledictionsvariegationsventilationsvindicationsvivisectionsvasodilatorsvaticinatoryvenesectionsverbenaceousvinegarroonsvacuolationsvasopressorsvaticinatorsviruliferousvituperatorsvituperatoryvociferators

About this list

Words
20 (8 common words)
Common example
vaccinations
Rare example
vociferators
Doubled letters
4
Ending in S
18

Questions

How many 12-letter words matching v________o__ are there?

20. 8 of them are common words.

What is a common example?

VACCINATIONS is among the common words in this set.