10-Letter Words Matching ____RH____

There are 20 10-letter words that match ____RH____. 6 are common words, such as DIARRHOEAS and POWERHOUSE. A rarer one is SUPERHYPES. In this set, E is the most frequent open letter (19 words). 4 words contain a doubled letter.

Full list 20

diarrhoeaspowerhousepyorrhoeasspearheadssuperhumanwaterholeslederhosenstairheadssuperheavysuperherosdiarrheticmonorhymedmonorhymespolyrhythmscirrhusessugarhousesuperheatssuperhelixsuperhypedsuperhypes

About this list

Words
20 (6 common words)
Common example
diarrhoeas
Rare example
superhypes
Doubled letters
4
Ending in S
10
Most frequent letter
E (19)

Questions

How many 10-letter words matching ____rh____ are there?

20. 6 of them are common words.

What is a common example?

DIARRHOEAS is among the common words in this set.