9-Letter Words Matching __B_____M

There are 15 9-letter words that match __B_____M. 7 are common words, such as ARBORETUM and BUBBLEGUM. A rarer one is BIBLICISM. In this set, I is the most frequent open letter (9 words). 5 words contain a doubled letter.

Full list 15

arboretumbubblegumcablegramelbowroomhybridismkibbutzimsubsystemcubiculumfibriformkabbalismlibriformrabbinismrebaptismsubphylumbiblicism

About this list

Words
15 (7 common words)
Common example
arboretum
Rare example
biblicism
Doubled letters
5
Ending in S
0
Most frequent letter
I (9)

Questions

How many 9-letter words matching __b_____m are there?

15. 7 of them are common words.

What is a common example?

ARBORETUM is among the common words in this set.