13-Letter Words Matching T_O__________

There are 21 13-letter words that match T_O__________. 8 are common words, such as THOROUGHBREDS and THOROUGHFARES. A rarer one is TROUBLOUSNESS. In this set, R is the most frequent open letter (19 words). 7 words contain a doubled letter.

Full list 21

thoroughbredsthoroughfaresthoroughgoingthoughtlesslytrolleybussestroublemakerstroubleshootstroublesomelythoracoplastythoroughpacedthoroughwortstoothsomenesstroublemakingthoracotomiesthoroughbracetoothbrushingtrophoblastictropicalizingtropocollagentrothplightedtroublousness

About this list

Words
21 (8 common words)
Common example
thoroughbreds
Rare example
troublousness
Doubled letters
7
Ending in S
9
Most frequent letter
R (19)

Questions

How many 13-letter words matching t_o__________ are there?

21. 8 of them are common words.

What is a common example?

THOROUGHBREDS is among the common words in this set.