12-Letter Words Matching __T___H_____

There are 18 12-letter words that match __T___H_____. 8 are common words, such as AFTERTHOUGHT and ASTROPHYSICS. A rarer one is MOTHERHOUSES. In this set, R is the most frequent open letter (14 words). 6 words contain a doubled letter.

Full list 18

afterthoughtastrophysicsbuttonholingcatchphrasesinterchangedinterchangesuntouchablesuntruthfullyantirrhinumseutrophicateorthorhombicanthophilousbuttonholersbuttonhookedinterchainedinterchangerinterchannelmotherhouses

About this list

Words
18 (8 common words)
Common example
afterthought
Rare example
motherhouses
Doubled letters
6
Ending in S
8
Most frequent letter
R (14)

Questions

How many 12-letter words matching __t___h_____ are there?

18. 8 of them are common words.

What is a common example?

AFTERTHOUGHT is among the common words in this set.