10-Letter Words Matching ____HR____

There are 31 10-letter words that match ____HR____. 7 are common words, such as BIRTHRATES and BIRTHRIGHT. A rarer one is UROCHROMES. In this set, I is the most frequent open letter (25 words). 6 words contain a doubled letter.

Full list 31

Common words

birthratesbirthrightcutthroatsdiaphragmsforthrightlunchroomspreshrinksbirthrootsdiachronicerythritolisochronalisochroous
birthratesbirthrightcutthroatsdiaphragmsforthrightlunchroomspreshrinksbirthrootsdiachronicerythritolisochronalisochroousroughridersynchronictrichroismtrichromaturethritisanachronicclathratesearthrisesepiphragmserythremiaerythrismserythriteserythrosinisochronesoutthrustssynchronalteethridgeurethritesurochromes

About this list

Words
31 (7 common words)
Common example
birthrates
Rare example
urochromes
Doubled letters
6
Ending in S
17
Most frequent letter
I (25)

Questions

How many 10-letter words matching ____hr____ are there?

31. 7 of them are common words.

What is a common example?

BIRTHRATES is among the common words in this set.