13-Letter Words Matching B_________A__

There are 13 13-letter words that match B_________A__. 3 are common words, such as BACCALAUREATE and BACCHANALIANS. A rarer one is BLEPHAROSPASM. In this set, E is the most frequent open letter (11 words). 4 words contain a doubled letter.

Full list 13

baccalaureatebacchanaliansbicentennialsbacteriophagebacteriostatsbibliotherapybrachycephalybacteriophagybibliomaniacsbimillennialsbiometriciansblepharoplastblepharospasm

About this list

Words
13 (3 common words)
Common example
baccalaureate
Rare example
blepharospasm
Doubled letters
4
Ending in S
6
Most frequent letter
E (11)

Questions

How many 13-letter words matching b_________a__ are there?

13. 3 of them are common words.

What is a common example?

BACCALAUREATE is among the common words in this set.