11-Letter Words Matching T________U_

There are 21 11-letter words that match T________U_. 7 are common words, such as TAUTOLOGOUS and TEASPOONFUL. A rarer one is TRISTIMULUS. 5 words contain a doubled letter.

Full list 21

tautologousteaspoonfultempestuoustendentioustreacheroustuberculoustyrannosaurtermitariumterraqueousterricolousterrigenoustibiotarsustripetaloustriphibioustriquetroustristichoustemerarioustendencioustetrameroustetrazoliumtristimulus

About this list

Words
21 (7 common words)
Common example
tautologous
Rare example
tristimulus
Doubled letters
5
Ending in S
17

Questions

How many 11-letter words matching t________u_ are there?

21. 7 of them are common words.

What is a common example?

TAUTOLOGOUS is among the common words in this set.