11-Letter Words Matching ___T____H__

There are 22 11-letter words that match ___T____H__. 7 are common words, such as BIRTHRIGHTS and LECTURESHIP. A rarer one is PROTOPATHIC. In this set, I is the most frequent open letter (18 words). 2 words contain a doubled letter.

Full list 22

birthrightslectureshipmouthwashespartnershipwhitefisheswhitewashedwhitewashescaptainshipgnatcatcherjusticeshipkittenishlyphotobathicprotolithicscattershotupstretchedwhitewasherwhitleatherearthlightsforthrightsmultiauthorplatyfishesprotopathic

About this list

Words
22 (7 common words)
Common example
birthrights
Rare example
protopathic
Doubled letters
2
Ending in S
7
Most frequent letter
I (18)

Questions

How many 11-letter words matching ___t____h__ are there?

22. 7 of them are common words.

What is a common example?

BIRTHRIGHTS is among the common words in this set.