12-Letter Words Matching ____R_B_____

There are 32 12-letter words that match ____R_B_____. 12 are common words, such as CONTRIBUTING and CONTRIBUTION. A rarer one is SUPERABOUNDS. In this set, I is the most frequent open letter (28 words). 2 words contain a doubled letter.

Full list 32

Common words

contributingcontributioncontributorscontributorydesirabilitydistributingdistributiondistributivedistributorsmemorabilityseparabilityvenerability
contributingcontributioncontributorscontributorydesirabilitydistributingdistributiondistributivedistributorsmemorabilityseparabilityvenerabilityadmirabilitycontrabassescontributivedistributaryincurabilityinsurabilitytolerabilityalterabilityanaerobiosesanaerobiosisdecerebrateddecerebratesdistributeesdoxorubicinsenterobiasesenterobiasishonorabilitypolyribosomeseverabilitysuperabounds

About this list

Words
32 (12 common words)
Common example
contributing
Rare example
superabounds
Doubled letters
2
Ending in S
11
Most frequent letter
I (28)

Questions

How many 12-letter words matching ____r_b_____ are there?

32. 12 of them are common words.

What is a common example?

CONTRIBUTING is among the common words in this set.