12-Letter Words Containing BIR

There are 12 12-letter words that contain BIR. 3 are common words, such as BIRDWATCHERS and HUMMINGBIRDS. A rarer one is THUNDERBIRDS. 3 words contain a doubled letter.

Full list 12

birdwatchershummingbirdsmockingbirdsbirdwatchingbirefringentbutcherbirdsbiracialismsblackbirdersblackbirdingsubirrigatedsubirrigatesthunderbirds

About this list

Words
12 (3 common words)
Common example
birdwatchers
Rare example
thunderbirds
Doubled letters
3
Ending in S
8

Questions

How many 12-letter words containing bir are there?

12. 3 of them are common words.

What is a common example?

BIRDWATCHERS is among the common words in this set.