13-Letter Words Matching __T____U_____

There are 20 13-letter words that match __T____U_____. 7 are common words, such as ASTRONAUTICAL and JITTERBUGGERS. A rarer one is ULTRACAUTIOUS. In this set, I is the most frequent open letter (18 words). 3 words contain a doubled letter.

Full list 20

astronauticaljitterbuggersjitterbugginglitigiousnessmotherfuckersmotherfuckingoutmaneuveredantepenultimaanthraquinonepathoneurosisantediluviansantirheumaticantiritualismantisexualityintermountaininterneuronalintraocularlyoutreboundingtetrafluorideultracautious

About this list

Words
20 (7 common words)
Common example
astronautical
Rare example
ultracautious
Doubled letters
3
Ending in S
6
Most frequent letter
I (18)

Questions

How many 13-letter words matching __t____u_____ are there?

20. 7 of them are common words.

What is a common example?

ASTRONAUTICAL is among the common words in this set.