8-Letter Words Matching ____HR__

There are 15 8-letter words that match ____HR__. 4 are common words, such as BRETHREN and URETHRAE. A rarer one is SYNCHROS. In this set, T is the most frequent open letter (12 words). 3 words contain a doubled letter.

Full list 15

brethrenurethraeurethralurethrasmisthrewmisthrowsubshrubcalthroperythronisochronoutthrewoutthroboutthrowsouthronsynchros

About this list

Words
15 (4 common words)
Common example
brethren
Rare example
synchros
Doubled letters
3
Ending in S
2
Most frequent letter
T (12)

Questions

How many 8-letter words matching ____hr__ are there?

15. 4 of them are common words.

What is a common example?

BRETHREN is among the common words in this set.