13-Letter Words Matching __T________U_

There are 21 13-letter words that match __T________U_. 2 are common words, such as HETEROGENEOUS and RUTHERFORDIUM. A rarer one is ULTRAPOWERFUL. In this set, O is the most frequent open letter (20 words). 1 words contain a doubled letter.

Full list 21

heterogeneousrutherfordiumactinouraniumanticlinoriumantireligiousarteriovenousautocephalousautochthonousentomophagousentomophilousheteropterousheterosporousmetalliferousorthognathoustetrastichousenterocoelousheterocystousinterstimulustetradynamousultracautiousultrapowerful

About this list

Words
21 (2 common words)
Common example
heterogeneous
Rare example
ultrapowerful
Doubled letters
1
Ending in S
17
Most frequent letter
O (20)

Questions

How many 13-letter words matching __t________u_ are there?

21. 2 of them are common words.

What is a common example?

HETEROGENEOUS is among the common words in this set.