8-Letter Words Matching ___B___L

There are 21 8-letter words that match ___B___L. 3 are common words, such as DOUBTFUL and DUMBBELL. A rarer one is PREBASAL. In this set, A is the most frequent open letter (16 words). 2 words contain a doubled letter.

Full list 21

doubtfuldumbbelltribunalbarbicelbarbitalcarbonylclubhaulgumbotilsorbitolturbinalcarbamylcarbarylcarbinolcarboxyldisbowelfimbrialforbidallambkilloutbrawlpanbroilprebasal

About this list

Words
21 (3 common words)
Common example
doubtful
Rare example
prebasal
Doubled letters
2
Ending in S
0
Most frequent letter
A (16)

Questions

How many 8-letter words matching ___b___l are there?

21. 3 of them are common words.

What is a common example?

DOUBTFUL is among the common words in this set.