13-Letter Words Matching T_______R____

There are 23 13-letter words that match T_______R____. 8 are common words, such as TESTOSTERONES and THENCEFORWARD. A rarer one is TURBELLARIANS. 4 words contain a doubled letter.

Full list 23

testosteronesthenceforwardtotalitarianstransmigratedtransmigratestriglyceridesturbochargersturbochargingthaumaturgisttheriomorphictransferrabletransmigratortreasurershiptetrahedrallytetrahedritestetrapyrrolesthaumaturgiestheocentrismsthermoformingtranspiercingtransthoracictubocurarinesturbellarians

About this list

Words
23 (8 common words)
Common example
testosterones
Rare example
turbellarians
Doubled letters
4
Ending in S
11

Questions

How many 13-letter words matching t_______r____ are there?

23. 8 of them are common words.

What is a common example?

TESTOSTERONES is among the common words in this set.