13-Letter Words Matching B____R_______

There are 20 13-letter words that match B____R_______. 4 are common words, such as BACKGROUNDERS and BACTERIOLOGIC. A rarer one is BITTERSWEETLY. 6 words contain a doubled letter.

Full list 20

backgroundersbacteriologicbarbarianismsbutterfingersbacteriolysesbacteriolysisbacteriophagebacteriostatsbanderillerosbarbarizationbarbarousnessbirefringencebizarrenessesboustrophedonbackgroundingbacteriolyticbacteriophagybacterizationbitterbrushesbittersweetly

About this list

Words
20 (4 common words)
Common example
backgrounders
Rare example
bittersweetly
Doubled letters
6
Ending in S
10

Questions

How many 13-letter words matching b____r_______ are there?

20. 4 of them are common words.

What is a common example?

BACKGROUNDERS is among the common words in this set.