15-Letter Words Matching _O_______B_____

There are 12 15-letter words that match _O_______B_____. 4 are common words, such as COMMUNICABILITY and NONAVAILABILITY. A rarer one is NONFLAMMABILITY. In this set, I is the most frequent open letter (12 words). 5 words contain a doubled letter.

Full list 12

communicabilitynonavailabilitynoncontributingnoncontributorycompressibilitycontemptibilitycontractibilitycontrollabilitycontainerboardsmonosyllabicitynonequilibriumsnonflammability

About this list

Words
12 (4 common words)
Common example
communicability
Rare example
nonflammability
Doubled letters
5
Ending in S
2
Most frequent letter
I (12)

Questions

How many 15-letter words matching _o_______b_____ are there?

12. 4 of them are common words.

What is a common example?

COMMUNICABILITY is among the common words in this set.