12-Letter Words Matching ______I___U_

There are 21 12-letter words that match ______I___U_. 6 are common words, such as ADVENTITIOUS and INAUSPICIOUS. A rarer one is UNFASTIDIOUS. In this set, S is the most frequent open letter (19 words). 3 words contain a doubled letter.

Full list 21

adventitiousinauspiciousmeretriciousnonreligioussuperciliousunpropitiousadscititiousdiverticuluminfundibulumnonmalicioussuppositioustranspicuousunsuspiciouscementitiouscunnilinctusmicrovillousnonambiguousperitrichouspolystichouspoststimulusunfastidious

About this list

Words
21 (6 common words)
Common example
adventitious
Rare example
unfastidious
Doubled letters
3
Ending in S
19
Most frequent letter
S (19)

Questions

How many 12-letter words matching ______i___u_ are there?

21. 6 of them are common words.

What is a common example?

ADVENTITIOUS is among the common words in this set.