12-Letter Words Containing RTU

There are 15 12-letter words that contain RTU. 9 are common words, such as FORTUITOUSLY and OPPORTUNISMS. A rarer one is VIRTUALITIES. In this set, I is the most frequent open letter (12 words). 4 words contain a doubled letter.

Full list 15

fortuitouslyopportunismsopportunistsparturitionsperturbationtortuousnessunfortunatesvirtuositiesvirtuousnessperturbativeperturbinglytortuositieschartulariespredeparturevirtualities

About this list

Words
15 (9 common words)
Common example
fortuitously
Rare example
virtualities
Doubled letters
4
Ending in S
10
Most frequent letter
I (12)

Questions

How many 12-letter words containing rtu are there?

15. 9 of them are common words.

What is a common example?

FORTUITOUSLY is among the common words in this set.