13-Letter Words Matching ____S____U___

There are 15 13-letter words that match ____S____U___. 5 are common words, such as ILLUSTRIOUSLY and INDUSTRIOUSLY. A rarer one is TSUTSUGAMUSHI. In this set, T is the most frequent open letter (14 words). 3 words contain a doubled letter.

Full list 15

illustriouslyindustriouslyredistributedredistributesundistributedredistributorantiscorbuticsinistrocularunresentfullyjurisconsultsmagistraturesnecessitouslyoverseriouslytransculturaltsutsugamushi

About this list

Words
15 (5 common words)
Common example
illustriously
Rare example
tsutsugamushi
Doubled letters
3
Ending in S
3
Most frequent letter
T (14)

Questions

How many 13-letter words matching ____s____u___ are there?

15. 5 of them are common words.

What is a common example?

ILLUSTRIOUSLY is among the common words in this set.